Plant Guide to Wiashal Trail, Santa Rosa Plateau

Plant Guide to Wiashal Trail, Santa Rosa Plateau

This is a working list, about which we make no guarantees at all until we officially release it. Use at your own risk!

Introduction and Explanation of Plant Trail Guides
Introduction
Highlights of This Trail
Fieldwork Dates and Summary of List Changes With Time
The Plant Guide
Comments On Specific Species
Introduction

The Wiashal Trail was formerly known as the Multiuse Trail, since bicyclists and horses are allowed on this trail.
This is the steepest, toughest trail of the Santa Rosa Plateau Ecological Reserve. The first 1.5 miles is an easy trail, but the rest of the trail is unlike all the other SRP trails in steepness and poor footing. In particular, the descents from the peaks are sometimes treacherous, with steep sections with deep rutting and loose material over rocks. We have trouble walking down those sections; we can't even imagine how mountain bikers can do those sections at all! But we suppose that is the excitement of this trail for the bikers. (;-)
However, this trail is worth it; it rewards the hiker with a very different aspect of the Santa Rosa Plateau. The trail is lined with hoaryleaf ceanothus and mission manzanita in many places, producing beautiful displays of color from those two species that is not found elsewhere on the Reserve. Many other species line the trail with color in places, including thick-leaved yerba santa, skunkweed and golden yarrow. There are hundreds of goldback ferns, accompanied by a number of California lace ferns, on the eastern descent. The views from the peaks along the trail are spectacular, including a good view of the San Gabriel Mountains and views of the Santa Rosa Plateau Ecological Reserve that cannot be obtained from any other location.
This trail contains some of the oldest chaparral (as measured in time since the last fire) in Southern California. The hoaryleaf ceanothus plants from mile ~0.3 to ~1.0 are all ~15 feet tall, very thin, very crowded, and contain a large percentage of dead stems (before the severe drought year of 2002 as well as afterward). A glance off trail immediately reveals the very low diversity of mature chaparral; there is nothing growing underneath those stems except immediately beside the trail.
Furthermore, there are no young hoaryleaf ceanothus in this section. Hoaryleaf ceanothus only grows from seed after a fire, and the plants live only ~80 years. If there is no fire for ~100 years or more, this species will be extirpated in this area, and have to recolonize this area from neighboring locations.
Except for that section, most of this area was burned in the Turner Fire of 1981.
Wiashal is pronounced wee - uh - shawl.
Trail parameters: The trail is 3.3 miles one way to the bottom, beginning at an elevation of 1800 feet and ending at 1200 feet. The bottom of the trail is 0.3 miles beyond the lower boundary of the Santa Rosa Plateau Ecological Reserve in a Murrieta Open Space Preserve. The one way hike beginning from the visitor center trailhead has an elevation gain of 550 feet and loss of 1150 feet. Doing the trail to the end and back as a round-trip is 6.6 miles, with 1700 feet of elevation gain and loss.
A one-way hike of this trail is possible by shuttling a car to the west end of Single Oak Way in Murrieta. It requires another 0.2 miles to get to your car from the bottom of this trail.
Directions for the car shuttle to do a one-way hike: Turn east onto Calle Del Oso Oro from Clinton Keith Road; turn right (south) onto Calle Cipres (called Via Moreno on the other side of Calle Del Oso Oro; immediately turn left on Placer Creek St, which ends at a T-Jct. with Single Oak Way; turn right and park (Thomas Bros. 927, E5). You'll return to your car through the opening between the houses on the northwest end of Single Oak Way.
To make sure you can find your car from the bottom of the trail, you should either GPS the location of your car, or walk up that opening to familiarize yourself with that area. Although you will at times be able to see your car as you hike down the trail, at the bottom of the trail you may be confused as to how to get to it. At the end of your hike on the trail, turn left at the T-junction and you will soon recognize the area at the opening between the houses if you have familiarized yourself with it beforehand.
Drive your other car to the Visitor Center Parking lot.
Here are a few GPS locations (NAD27 datum; decimal degrees) that might come in handy:

Location Latitude Longitude
Parking at northwest end of cul-de-sec of Single Oak Way 33.56422 -117.25152
Bottom of Wiashal Trail 33.56267 -117.25278
Boundary of Santa Rosa Plateau Ecological Reserve on Wiashal Trail 33.56443 -117.25485

Directions to trailhead: The signed trailhead is at the northwest corner of the Visitor Center Parking lot, immediately north of the entrance gate.
Highlights of This Trail

The botanical highlights of this trail are:

Number of Unique Taxa On This Trail

The following histogram gives the number of trails in our database that contain each taxon on this trail. There were 90 trails in our database when this histogram was made; 16 of those trails, including this one, are at the Santa Rosa Plateau Ecological Reserve. A number of "1" means the taxon has only been found only on this list, among all the trails in our database; numbers of "16" or smaller may indicate taxa found only in this area.

Number of Trails
Containing A Taxon Number Of Taxa
On This Trail % of Taxa
On This Trail
1 0 0%
2 3 2%
3 1 1%
4 7 4%
5 5 3%

1-5 16 8%
6-10 31 16%
11-15 34 17%
16-20 27 14%
21-25 31 16%
26-30 18 9%
31-35 10 5%
36-40 9 5%
41-45 13 7%
46-50 2 1%
51-55 7 4%
Total Taxa 198 100%

We found 2 additional species not in the above table, since they have not been fully identified yet. The unidentified ones are marked with ?, sp or ssp in the id? column in the guide, and have no entries in the #all column.
Fieldwork Dates and Summary of List Changes With Time

The following table gives the dates the trail was walked and taxa recorded. After each visit, the table gives the total number of taxa on the list and the breakdown of the taxa without positive identification. See Explanation of Plant Trail Guides to understand the symbols below.

Visit Date Visit # # taxa # "?" # "sp" # "~" # "ssp" Comments
10/26/2002 1 71 4 10 5 5 only up to mile 2.55 after the severe drought year
12/8/2003 2 72 3 10 4 5 only to id the Stephanomeria species
11/30/2004 3 94 5 10 4 4
5/26/2005 4 153 2 5 10 1 only to mile 1.30
5/30/2005 5 174 3 3 8 1
8/2/2005 6 179 2 1 6 1 only to mile 1.71
8/10/2005 7 179 2 1 6 1 only after mile 1.71
2/15/2006 8 186 2 1 8 1
4/17/2006 9 200 1 0 6 1

We thank Michael Charters for finding the Mimulus cardinalis at mile 0.09 on 8/4/05, and Rolf Muertter for help with the fieldwork on 4/17/06.
The Plant Guide

Version for printing, without lines and other text on this page: html (8 pages), pdf Clickbook booklet (2 double-sided pages), or Large Type pdf Clickbook booklet (3 double-sided pages). (See printing instructions for an explanation of these options)
The mileages have been adjusted to a GPS recording of the trail, and should be accurate to 0.01-0.02 miles.

Mile S # id? Common Name Latin Name #here #all
0.00 Beginning of Wiashal Trail at northwest edge of SRP Visitor Center Parking Lot. This guide begins at the post holding the swinging end of the entrance gate; elevation ~1800 feet (550 m)
0.00 b 1 California buckwheat Eriogonum fasciculatum var. foliolosum 99 / 9 51
0.00 l 2 saw-toothed goldenbush Hazardia squarrosa var. grindelioides 99 / 9 35
0.00 b 3 *soft chess Bromus hordeaceus 99 / 9 40
0.00 b 4 telegraph weed Heterotheca grandiflora 5 / 2 34
0.00 b 5 *narrowleaf filago Filago gallica 99 / 9 45
0.00 b 6 *shortpod mustard Hirschfeldia incana 99 / 9 51
0.00 b 7 *tocalote Centaurea melitensis 99 / 9 45
0.00 b 8 everlasting nest-straw Stylocline gnaphaloides 99 / 9 11
0.00 b 9 *redstem filaree Erodium cicutarium 99 / 9 54
0.00 b 10 holly-leaf navarretia Navarretia atractyloides 1 / 1 7
0.00 b 11 strigose lotus Lotus strigosus 50 / 9 33
0.00 b 12 *smooth cat's ear Hypochaeris glabra 99 / 9 34
0.00 b 13 San Diego tarweed Hemizonia paniculata 99 / 9 7
0.00 b 14 *Mediterranean schismus Schismus barbatus 99 / 9 22
0.00 r 15 slender combseed Pectocarya linearis ssp. ferocula 20 / 2 7
0.00 r 16 pygmy-weed Crassula connata 99 / 9 28
0.00 r 17 small-head field clover Trifolium microcephalum 20 / 9 9
0.00 r 18 *short-fruited filaree Erodium brachycarpum 20 / 3 16
0.00 b 19 *red brome Bromus madritensis ssp. rubens 99 / 9 51
0.00 r 20 fragrant everlasting Gnaphalium canescens ssp. beneolens 10 / 9 23
0.00 b 21 hooked skunkweed Navarretia hamata ssp. hamata 99 / 9 10
0.00 b 22 Spanish clover Lotus purshianus var. purshianus 99 / 9 30
0.00 b 23 *nit grass Gastridium ventricosum 99 / 9 22
0.00 b 24 *scarlet pimpernel Anagallis arvensis 99 / 9 31
0.00 b 25 San Diego birdsfoot lotus Lotus hamatus 20 / 5 23
0.00 l 26 ~ slender popcorn flower Plagiobothrys tenellus 50 / 9 3
0.00 l 27 *rattail fescue Vulpia myuros var. myuros 99 / 9 21
0.00 r 28 rattlesnake weed Daucus pusillus 99 / 9 28
0.00 r 29 slender wreathplant Stephanomeria exigua ssp. deanei 50 / 9 12
0.00 b 30 bristly bird's beak Cordylanthus rigidus ssp. setigerus 99 / 9 25
0.00 b 31 canchalagua Centaurium venustum 99 / 9 12
0.00 l 32 California-aster Lessingia filaginifolia var. filaginifolia 30 / 9 51
0.00 r 33 Pomona locoweed Astragalus pomonensis 20 / 9 10
0.00 l Sign: "Wiashal Trail (straight); to Cole Canyon 3.5 mi"
0.00 r 34 *prickly sow thistle Sonchus asper ssp. asper 50 / 9 28
0.00 b 35 chamise Adenostoma fasciculatum 99 / 9 37
0.00 l 36 purple owl's clover Castilleja exserta ssp. exserta 10 / 3 12
0.00 l 37 *slender wild oats Avena barbata 99 / 9 38
0.00 r 38 golden yarrow Eriophyllum confertiflorum var. confertiflorum 99 / 9 53
0.00 r 39 silver puffs Uropappus lindleyi 20 / 9 25
0.00 r 40 leafy daisy Erigeron foliosus var. foliosus 50 / 9 42
0.01 l 41 Torrey's scrub oak Quercus acutidens 30 / 9 26
0.01 r 42 deerweed Lotus scoparius var. scoparius⁺ 30 / 9 28
0.01 l Jct. bicycle / horse entrance from Clinton Keith Road
0.01 r 43 popcorn flower Cryptantha intermedia 99 / 9 27
0.01 l 44 purple clarkia Clarkia purpurea ssp. quadrivulnera 50 / 5 24
0.01 l 45 rush-rose Helianthemum scoparium 5 / 5 14
0.01 r Check for yellow mariposa lily, Calochortus weedii var. weedii
0.01 b 46 triangular-fruit sedge Carex triquetra 20 / 9 16
0.01 r 47 narrowleaf bedstraw Galium angustifolium ssp. angustifolium 30 / 9 47
0.01 b 48 redberry Rhamnus crocea 20 / 9 15
0.01 l 49 hoaryleaf ceanothus Ceanothus crassifolius 99 / 9 12
0.01 r 50 blue dicks Dichelostemma capitatum ssp. capitatum 50 / 9 45
0.01 l 51 splendid mariposa lily Calochortus splendens 50 / 9 17
0.01 l 52 coast jepsonia Jepsonia parryi 30 / 2 15
0.02 b 53 foothill needlegrass Nassella lepida 30 / 9 20
0.02 r 54 chaparral yucca Yucca whipplei 5 / 5 31
0.02 b 55 purple head Acourtia microcephala 5 / 3 19
0.02 l 56 ground pink Linanthus dianthiflorus 30 / 9 9
0.03 l 57 intermediate sun-cups Camissonia intermedia 30 / 9 6
0.03 l 58 coast-range melic Melica imperfecta 99 / 9 42
0.03 l 59 southern honeysuckle Lonicera subspicata var. denudata 20 / 9 40
0.03 b 60 climbing bedstraw Galium nuttallii ssp. nuttallii 50 / 9 30
0.03 r 61 hollyleaf redberry Rhamnus ilicifolia 20 / 9 43
0.04 l 62 southern Indian pink Silene laciniata ssp. major 2 / 2 19
0.04 l 63 bush monkeyflower Mimulus aurantiacus 40 / 9 42
0.04 l 64 *windmill pink Silene gallica 99 / 9 32
0.04 l 65 Parish's purple nightshade Solanum parishii 30 / 9 20
0.05 l 66 Tejon cryptantha Cryptantha microstachys 10 / 2 6
0.05 l 67 basketbush Rhus trilobata 10 / 5 24
0.05 r 68 goldback fern Pentagramma triangularis ssp. triangularis 99 / 9 24
0.05 l 69 blue larkspur Delphinium parryi ssp. parryi 30 / 5 12
0.06 r 70 mustang mint Monardella lanceolata 5 / 1 5
0.06 l 71 San Diego pea Lathyrus vestitus var. alefeldii 2 / 2 20
0.06 l 72 seashore bentgrass Agrostis pallens 30 / 3 8
0.07 l 73 *sow thistle Sonchus oleraceus 20 / 9 39
0.07 l 74 Pacific sanicle Sanicula crassicaulis 3 / 1 21
0.07 l 75 cobwebby thistle Cirsium occidentale var. occidentale⁺ 3 / 2 7
0.07 r 76 California everlasting Gnaphalium californicum 99 / 9 42
0.07 b 77 coast live oak Quercus agrifolia var. agrifolia 5 / 5 42
0.07 r 78 threadstem Pterostegia drymarioides 20 / 9 29
0.07 r 79 southern miner's lettuce Claytonia perfoliata ssp. mexicana 30 / 5 25
0.07 r 80 common bedstraw Galium aparine 30 / 5 39
0.07 r 81 *common chickweed Stellaria media 30 / 3 28
0.07 r 82 giant wild-rye Leymus condensatus 1 / 1 27
0.07 b 83 *bull thistle Cirsium vulgare⁺ 2 / 1 16
0.07 r 84 *ripgut brome Bromus diandrus 30 / 3 51
0.07 r 85 checkerbloom Sidalcea malviflora ssp. sparsifolia 10 / 3 25
0.07 b 86 johnny jump-up Viola pedunculata 30 / 3 15
0.07 r 87 ssp *foxtail barley Hordeum murinum 10 / 2
0.07 r 88 *hedge mustard Sisymbrium officinale 5 / 2 20
0.07 r 89 ~ basket rush Juncus textilis 10 / 1 4
0.07 r 90 blue wildrye Elymus glaucus ssp. glaucus 20 / 9 20
0.07 r 91 white-flowering currant Ribes indecorum 3 / 3 22
0.08 b 92 goldenrod Solidago californica 2 / 1 34
0.08 l 93 ~ horseweed Conyza canadensis 10 / 5 35
0.08 l 94 sticky cinquefoil Potentilla glandulosa ssp. glandulosa 5 / 1 15
0.08 l 95 *prickly lettuce Lactuca serriola 99 / 9 42
0.08 l 96 long-leaved rush Juncus macrophyllus 2 / 2 4
0.08 r 97 *California burclover Medicago polymorpha 30 / 3 41
0.08 l 98 toad rush Juncus bufonius var. bufonius 50 / 5 12
0.08 l 99 *grass poly Lythrum hyssopifolia 10 / 2 13
0.08 l Check for a lupine that appeared here only in 2005
0.08 b 100 western ragweed Ambrosia psilostachya 10 / 1 36
0.08 b 101 *hairy rattail fescue Vulpia myuros var. hirsuta 99 / 9 16
0.08 r 102 American vetch Vicia americana var. americana 2 / 1 9
0.08 b 103 narrow-leaved miner's lettuce Claytonia parviflora ssp. parviflora 10 / 1 21
0.08 l (black sage, Salvia mellifera)
0.08 l 104 *knotweed Polygonum arenastrum 2 / 2 16
0.08 l *Check for Bermuda grass, Cynodon dactylon, probably sighted here in 2005 but absent in 2006.10228
0.08 l 105 *white-stemmed filaree Erodium moschatum 10 / 1 22
0.08 l 106 *sourclover Melilotus indicus 20 / 1 22
0.08 l 107 *Italian rye-grass Lolium multiflorum 10 / 1 14
0.08 r 108 tree clover Trifolium ciliolatum 20 / 5 10
0.09 l (mule fat, Baccharis salicifolia)
0.09 r 109 arroyo willow Salix lasiolepis⁺ 1 / 1 33
0.09 r Begin bridge over small drainage. In drainage to left: California fuchsia, Epilobium canum ssp. canum; rabbits-foot grass, Polypogon monspeliensis. In drainage to right: deergrass, Muhlenbergia rigens. In drainage on both sides: scarlet monkeyflower, Mimulus cardinalis.
0.09 r 110 dwarf lupine Lupinus bicolor 50 / 9 29
0.09 r 111 Durango root Datisca glomerata 1 / 1 6
0.09 b 112 wild tarragon Artemisia dracunculus 3 / 1 21
0.09 End bridge
0.09 r 113 angel's gilia Gilia angelensis 10 / 2 14
0.09 r 114 matchweed Gutierrezia sarothrae 3 / 2 9
0.09 l 115 ~ bristly goldenaster Heterotheca sessiliflora ssp. echioides 1 / 1 7
0.09 l 116 *wall bedstraw Galium parisiense 20 / 1 7
0.09 l 117 *Crete weed Hedypnois cretica 20 / 2 22
0.09 l 118 slender madia Madia gracilis 10 / 2 17
0.10 l 119 long-stemmed buckwheat Eriogonum elongatum var. elongatum 1 / 1 26
0.10 b 120 three spot Osmadenia tenella 20 / 2 12
0.10 r 121 ~ purple sanicle Sanicula bipinnatifida 2 / 1 11
0.11 Jct. use trail
0.11 Enter chamise forest
0.11 l (California bee plant, Scrophularia californica ssp. floribunda)
0.12 l 122 papillate dodder Cuscuta californica var. papillosa 10 / 3 2
0.12 r 123 common skullcap Scutellaria tuberosa 10 / 2 5
0.13 l Jct. faint path; first of many beautiful patches of canchalagua, Centaurium venustum
0.16 l (common groundsel, Senecio vulgaris)
0.16 l 124 sharp-toothed sanicle Sanicula arguta 2 / 2 18
0.17 r 125 *long-beaked filaree Erodium botrys 20 / 3 9
0.17 l 126 *curly dock Rumex crispus 1 / 1 23
0.17 r 127 rattlesnake weed Chamaesyce albomarginata 10 / 1 7
0.18 b 128 fringed spineflower Chorizanthe fimbriata var. fimbriata 99 / 5 7
0.18 b 129 sapphire woolly-star Eriastrum sapphirinum 99 / 9 7
0.18 l 130 deergrass Muhlenbergia rigens⁺ 5 / 2 21
0.18 r ~ (coyote bush, Baccharis pilularis)
0.19 l (poison oak, Toxicodendron diversilobum)
0.20 r 131 showy penstemon Penstemon spectabilis var. spectabilis⁺ 3 / 1 11
0.23 r Jct. driveway into 40 acre inholding.
0.23 132 *Russian thistle Salsola tragus 1 / 1 25
0.23 r 133 *common groundsel Senecio vulgaris 2 / 1 19
0.23 Jct. parking lot; elevation 1760 feet (535 m); continue on trail to right.
0.24 l 134 *pineapple weed Chamomilla suaveolens 10 / 1 19
0.24 r (California poppy, Eschscholzia californica)
0.24 r Go through gate; sign: "Trail"
0.24 r 135 cotton-batting plant Gnaphalium stramineum 30 / 9 14
0.27 r Sign: "Mountain Lion...".
0.28 l 136 black sage Salvia mellifera 50 / 9 40
0.29 l 137 purple snapdragon Antirrhinum nuttallianum ssp. nuttallianum 99 / 9 17
0.29 Begin uphill section
0.33 r 138 California lace fern Aspidotis californica 20 / 9 9
0.34 l 139 mission manzanita Xylococcus bicolor 99 / 9 14
0.34 l 140 wild-cucumber Marah macrocarpus var. macrocarpus 5 / 5 43
0.34 Trail begins series of close-spaced 90° turns; enter forest of hoaryleaf ceanothus, Ceanothus crassifolius, and cross a minor drainage.
0.34 l 141 meally white pincushion Chaenactis artemisiifolia 50 / 9 14
0.35 l 142 California chicory Rafinesquia californica 40 / 9 22
0.37 b 143 San Diego wreathplant Stephanomeria diegensis 30 / 9 20
0.38 r 144 caterpillar phacelia Phacelia cicutaria var. hispida 30 / 5 15
0.38 l 145 laurel sumac Malosma laurina 50 / 9 42
0.40 Local high point on trail; elevation 1840 feet (560 m)
0.41 r 146 California peony Paeonia californica 2 / 2 17
0.42 l 147 sugar bush Rhus ovata 5 / 5 25
0.43 l intermediate sun-cups Camissonia intermedia⁺ /
0.43 r Jct. use trail
0.43 l (honking California bee plant, Scrophularia californica ssp. floribunda)
0.43 148 southern California morning-glory Calystegia macrostegia ssp. arida⁺ 10 / 9 17
0.44 Trail is flattish here, but continues to descend
0.44 r Check for different Vulpia sp.
0.44 r 149 false monkeyflower Mimulus pilosus 99 / 9 5
0.48 l 150 slender sunflower Helianthus gracilentus 50 / 9 12
0.48 l 151 thick-leaved yerba santa Eriodictyon crassifolium var. crassifolium 50 / 9 7
0.49 l (bird's-foot fern, Pellaea mucronata var. mucronata)
0.50 l 152 tomcat clover Trifolium willdenovii 20 / 2 17
0.50 r 153 floriferous monkeyflower Mimulus floribundus 20 / 3 5
0.50 r 154 California popcorn flower Plagiobothrys collinus var. fulvescens 5 / 1 4
0.50 l 155 *rabbits-foot grass Polypogon monspeliensis 3 / 1 20
0.51 156 *Bermuda grass Cynodon dactylon 10 / 1 90
0.52 Local low point on trail, followed by minor local high point then minor local low point
0.53 View of San Jacinto Mountains at 2 o'clock.
0.54 b 157 yellow pincushion Chaenactis glabriuscula var. glabriuscula 99 / 9 13
0.55 Local high point on trail
0.60 r (toyon, Heteromeles arbutifolia)
0.60 Cross small drainage; local low point on trail, followed by a series of minor local high and low points
0.60 l 158 clustered toad rush Juncus bufonius var. congestus 10 / 1 4
0.66 l Jct. cleared path?
0.67 r 159 western toad rush Juncus bufonius var. occidentalis 10 / 1 2
0.67 r 160 slender woolly marbles Psilocarphus tenellus var. tenellus 20 / 1 4
0.67 l 161 Venus looking-glass Triodanis biflora 10 / 1 2
0.77 Cross small drainage with black culvert
0.77 b 162 shiny lomatium Lomatium lucidum 2 / 1 7
0.81 Local low point; cross small drainage; elevation ~1750 feet (535 m); climb now steep.
0.90 r southern California morning-glory Calystegia macrostegia ssp. arida⁺ /
0.92 l 163 bicolored everlasting Gnaphalium bicolor 10 / 5 29
0.92 l 164 chaparral beard-tongue Keckiella antirrhinoides var. antirrhinoides 30 / 9 10
0.92 r 165 San Diego mountain mahogany Cercocarpus minutiflorus 3 / 2 12
0.97 b 166 California sagebrush Artemisia californica 10 / 4 46
0.99 First of many local high points; elevation ~1840 feet (560 m)
1.15 Check for different Cuscuta sp.
1.21 b 167 bird's-foot fern Pellaea mucronata var. mucronata 10 / 9 30
1.21 Cross small drainage.
1.28 b 168 hollyleaf cherry Prunus ilicifolia ssp. ilicifolia 5 / 1 12
1.30 b 169 common monkeyflower Mimulus guttatus 20 / 1 13
1.30 l deergrass Muhlenbergia rigens /
1.30 b 170 variegated clover Trifolium variegatum 20 / 1 4
1.30 b 171 wrinkled rush Juncus rugulosus 10 / 1 9
1.30 r 172 slim vetch Vicia ludoviciana var. ludoviciana 5 / 1 8
1.30 Cross dike cutting boulder in trail
1.30 Cross middle of bridge; local low point; elevation ~1755 feet (535 m)
1.30 l 173 California poppy Eschscholzia californica 2 / 1 29
1.32 Cross small drainage
1.32 l 174 wide-throated yellow monkeyflower Mimulus brevipes 5 / 1 12
1.32 l 175 rough-seeded blue toad-flax Linaria canadensis var. texana 1 / 1 10
1.35 Cross small drainage
1.43 View of San Gabriel Mountains at 10 o'clock at a local high point
1.49 Cross small drainage over a black-pipe culvert; elevation ~1755 feet (535 m). Trail now goes upward steeply.
1.54 l 176 chia Salvia columbariae 20 / 3 21
1.56 l 177 wild canterbury bells Phacelia minor 20 / 5 21
1.57 r 178 *common cudweed Gnaphalium luteo-album / 14
l 179 short-winged deerweed Lotus scoparius var. brevialatus⁺ 30 / 9 22
1.59 b 180 Coulter's snapdragon Antirrhinum coulterianum 30 / 9 5
1.59 r 181 California suncup Camissonia californica 3 / 3 20
1.59 r Check for new species like a gilia
1.60 r 182 California filago Filago californica 20 / 9 21
1.68 r Rock overhang / shelter 5 steps away.
1.68 l 183 twining snapdragon Antirrhinum kelloggii 5 / 2 6
1.71 l Jct. Overlook trail; elevation ~1920 feet (585 m). Sign: "To Overlook 0.1 mi [left]; Wiashal Trail [right]"
1.78 l 184 *wild oats (waif?) Avena fatua 1 / 1 25
1.78 Highest point on trail; elevation ~1950 feet (595 m)
2.01 r Jct. use trail
2.02 First of two closely-spaced saddles; elevation ~1750 feet (535 m)
2.10 l 185 yellow mariposa lily Calochortus weedii var. weedii 30 / 9 10
2.12 r 186 white everlasting Gnaphalium canescens ssp. microcephalum 1 / 1 36
2.12 l 187 ~ sand cress Calyptridium monandrum 10 / 1 12
2.13 Local high point; elevation ~1800 feet (550 m)
2.18 Big patch of sapphire woolly-star, Eriastrum sapphirinum
2.19 Second of two closely-spaced saddles; elevation ~1750 feet (535 m)
2.24 b 188 small-seeded spurge Chamaesyce polycarpa 20 / 2 13
2.27 l Jct. blocked-off trail easily visible only on return trip
2.29 Local peak, elevation ~1840 feet (560 m), with a nice flat rock for sitting on, with great views
2.33 l Jct. trail blocked-off by line of large rocks; note "Eagle Rock" ahead if the light is right.
2.35 l Jct. Second Overlook Trail. Sign: "To Overlook 0.1 mi [left]; Wiashal Trail [right]". Note "Eagle Rock" has turned into "Turkey Vulture" rock, if you are coming back from the Overlook. Most of the many switchbacks on the descent are not noted.
2.40 l 189 *Italian thistle Carduus pycnocephalus⁺ 2 / 2 18
2.48 r 190 eucrypta Eucrypta chrysanthemifolia var. chrysanthemifolia 30 / 5 26
2.53 r Jct. use trail
2.54 Trail turns left 90°
2.56 Switchback right; (blocked-off old trail continues ahead)
2.60 r 191 scaly lipfern Cheilanthes clevelandii 5 / 1 4
2.62 r (California four o'clock, Mirabilis californica)
2.64 r 192 wild celery Apiastrum angustifolium 10 / 2 14
2.75 r 193 California four o'clock Mirabilis californica 1 / 1 22
2.75 Switchback left; jct. with new trail going uphill
2.78 l 194 odora Porophyllum gracile 4 / 4 6
2.83 l 195 ? dead like clarkia, seedling like chinese houses ? 10 / 1
2.95 r 196 California polypody Polypodium californicum 1 / 1 16
2.99 l 5 deergrass plants, Muhlenbergia rigens, above the trail that seem twice normal size since they are above you, instead of their normal position below you in a drainage
2.99 l (San Diego sedge, Carex spissa)
3.00 r Jct. blocked-off trail
3.02 l Sign: "SRPER boundary; Wiashal Trail"
3.19 l 197 *goldentop Lamarckia aurea 10 / 1 23
3.22 r Sign: "No motor vehicles"
3.22 l Sign: "Cole Canyon; (to) Santa Rosa Plateau"
3.22 r Jct. use trail
3.23 r 198 southern suncup Camissonia bistorta 3 / 1 11
3.23 l 199 chaparral bush mallow Malacothamnus fasciculatus 1 / 1 14
3.24 T-jct.; go right; sign on left: "No trespassing PC602(J)"
3.26 l 200 nodding needlegrass Nassella cernua 3 / 1 19
3.30 b Jct. trail; sign: "Please stay on trail"
3.30 End trail at T-jct. with a road; elevation 1200 feet (365 m); end plant trail guide; go left to get to the lower trailhead parking on Single Oak Way.
3.34 Road curves right toward back yards of homes
3.36 Trail curves left and parallels back yards of homes
3.41 Y-jct with path; stay right
3.45 Leave road and head toward access in fence
3.49 Cul-de-sac near end of Single Oak Way

Comments On Specific Species

Lotus scoparius. The subspecies are well-segregated on this trail. Mile 0.00 to somewhere before mile 1.74 contains only ssp. scoparius; at and after mile 1.74, all the plants are ssp. brevialatus.
Camissonia intermedia. The identification comes from specimens at mile 0.44 and 2.62; it is possible that the first specimen is not this id, but unlikely.
Cirsium occidentale var. occidentale. The identification of this first specimen comes from specimens at mile 0.24 on this trail and a short distance down this drainage on the Granite Loop Trail. Cirsium vulgare is also found in this location, so the first thistle in other years may be that taxon.
Muhlenbergia rigens, Penstemon spectabilis var. spectabilis. The first specimen on the trail for each of these species found in 2002 was dead in 2004. The first live specimen of Muhlenbergia rigens in 2005 is noted; there were no other specimens of Penstemon spectabilis var. spectabilis.
Cirsium vulgare, Carduus pycnocephalus. These noxious weeds are eliminated when seen, so we hope you don't see it on this trail.
Salix lasiolepis. This is the only mature specimen on the trail. Two subsequent drainages had a number of baby arroyo willows come up in 2005, even though those drainages had no visible mature willows in them, but it isn't clear how long they will survive.
Calystegia macrostegia ssp. arida. The first occurrence of this taxon was not seen in 2006. The first occurrence in 2006 is therefore given later, without a new species number.
About half the plants at the SRP appear to be ssp. arida, with the other half split between sspp. "intermedia" and "tenuifolia". It has long troubled Tom to be finding three subspecies in the small area of the SRP. Worse, the classification of a given plant has changed with time, which was extremely puzzling.
These difficulties were resolved when Tom found clear evidence that subspecies "intermedia" and "tenuifolia" are bogus. Hence we assign all the SRP plants to ssp. arida.
Tom thanks Jane Strong for her considerable assistance with helping him to learn the plants of the Santa Rosa Plateau.

Location	Latitude	Longitude
Parking at northwest end of cul-de-sec of Single Oak Way	33.56422	-117.25152
Bottom of Wiashal Trail	33.56267	-117.25278
Boundary of Santa Rosa Plateau Ecological Reserve on Wiashal Trail	33.56443	-117.25485

Number of Trails Containing A Taxon	Number Of Taxa On This Trail	% of Taxa On This Trail
1	0	0%
2	3	2%
3	1	1%
4	7	4%
5	5	3%

1-5	16	8%
6-10	31	16%
11-15	34	17%
16-20	27	14%
21-25	31	16%
26-30	18	9%
31-35	10	5%
36-40	9	5%
41-45	13	7%
46-50	2	1%
51-55	7	4%
Total Taxa	198	100%

Visit Date	Visit #	# taxa	# "?"	# "sp"	# "~"	# "ssp"	Comments
10/26/2002	1	71	4	10	5	5	only up to mile 2.55 after the severe drought year
12/8/2003	2	72	3	10	4	5	only to id the Stephanomeria species
11/30/2004	3	94	5	10	4	4
5/26/2005	4	153	2	5	10	1	only to mile 1.30
5/30/2005	5	174	3	3	8	1
8/2/2005	6	179	2	1	6	1	only to mile 1.71
8/10/2005	7	179	2	1	6	1	only after mile 1.71
2/15/2006	8	186	2	1	8	1
4/17/2006	9	200	1	0	6	1

Mile	S	#	id?	Common Name	Latin Name	#here	#all
0.00				Beginning of Wiashal Trail at northwest edge of SRP Visitor Center Parking Lot. This guide begins at the post holding the swinging end of the entrance gate; elevation ~1800 feet (550 m)
0.00	b	1		California buckwheat	Eriogonum fasciculatum var. foliolosum	99 / 9	51
0.00	l	2		saw-toothed goldenbush	Hazardia squarrosa var. grindelioides	99 / 9	35
0.00	b	3		*soft chess	Bromus hordeaceus	99 / 9	40
0.00	b	4		telegraph weed	Heterotheca grandiflora	5 / 2	34
0.00	b	5		*narrowleaf filago	Filago gallica	99 / 9	45
0.00	b	6		*shortpod mustard	Hirschfeldia incana	99 / 9	51
0.00	b	7		*tocalote	Centaurea melitensis	99 / 9	45
0.00	b	8		everlasting nest-straw	Stylocline gnaphaloides	99 / 9	11
0.00	b	9		*redstem filaree	Erodium cicutarium	99 / 9	54
0.00	b	10		holly-leaf navarretia	Navarretia atractyloides	1 / 1	7
0.00	b	11		strigose lotus	Lotus strigosus	50 / 9	33
0.00	b	12		*smooth cat's ear	Hypochaeris glabra	99 / 9	34
0.00	b	13		San Diego tarweed	Hemizonia paniculata	99 / 9	7
0.00	b	14		*Mediterranean schismus	Schismus barbatus	99 / 9	22
0.00	r	15		slender combseed	Pectocarya linearis ssp. ferocula	20 / 2	7
0.00	r	16		pygmy-weed	Crassula connata	99 / 9	28
0.00	r	17		small-head field clover	Trifolium microcephalum	20 / 9	9
0.00	r	18		*short-fruited filaree	Erodium brachycarpum	20 / 3	16
0.00	b	19		*red brome	Bromus madritensis ssp. rubens	99 / 9	51
0.00	r	20		fragrant everlasting	Gnaphalium canescens ssp. beneolens	10 / 9	23
0.00	b	21		hooked skunkweed	Navarretia hamata ssp. hamata	99 / 9	10
0.00	b	22		Spanish clover	Lotus purshianus var. purshianus	99 / 9	30
0.00	b	23		*nit grass	Gastridium ventricosum	99 / 9	22
0.00	b	24		*scarlet pimpernel	Anagallis arvensis	99 / 9	31
0.00	b	25		San Diego birdsfoot lotus	Lotus hamatus	20 / 5	23
0.00	l	26	~	slender popcorn flower	Plagiobothrys tenellus	50 / 9	3
0.00	l	27		*rattail fescue	Vulpia myuros var. myuros	99 / 9	21
0.00	r	28		rattlesnake weed	Daucus pusillus	99 / 9	28
0.00	r	29		slender wreathplant	Stephanomeria exigua ssp. deanei	50 / 9	12
0.00	b	30		bristly bird's beak	Cordylanthus rigidus ssp. setigerus	99 / 9	25
0.00	b	31		canchalagua	Centaurium venustum	99 / 9	12
0.00	l	32		California-aster	Lessingia filaginifolia var. filaginifolia	30 / 9	51
0.00	r	33		Pomona locoweed	Astragalus pomonensis	20 / 9	10
0.00	l			Sign: "Wiashal Trail (straight); to Cole Canyon 3.5 mi"
0.00	r	34		*prickly sow thistle	Sonchus asper ssp. asper	50 / 9	28
0.00	b	35		chamise	Adenostoma fasciculatum	99 / 9	37
0.00	l	36		purple owl's clover	Castilleja exserta ssp. exserta	10 / 3	12
0.00	l	37		*slender wild oats	Avena barbata	99 / 9	38
0.00	r	38		golden yarrow	Eriophyllum confertiflorum var. confertiflorum	99 / 9	53
0.00	r	39		silver puffs	Uropappus lindleyi	20 / 9	25
0.00	r	40		leafy daisy	Erigeron foliosus var. foliosus	50 / 9	42
0.01	l	41		Torrey's scrub oak	Quercus acutidens	30 / 9	26
0.01	r	42		deerweed	Lotus scoparius var. scoparius⁺	30 / 9	28
0.01	l			Jct. bicycle / horse entrance from Clinton Keith Road
0.01	r	43		popcorn flower	Cryptantha intermedia	99 / 9	27
0.01	l	44		purple clarkia	Clarkia purpurea ssp. quadrivulnera	50 / 5	24
0.01	l	45		rush-rose	Helianthemum scoparium	5 / 5	14
0.01	r			Check for yellow mariposa lily, Calochortus weedii var. weedii
0.01	b	46		triangular-fruit sedge	Carex triquetra	20 / 9	16
0.01	r	47		narrowleaf bedstraw	Galium angustifolium ssp. angustifolium	30 / 9	47
0.01	b	48		redberry	Rhamnus crocea	20 / 9	15
0.01	l	49		hoaryleaf ceanothus	Ceanothus crassifolius	99 / 9	12
0.01	r	50		blue dicks	Dichelostemma capitatum ssp. capitatum	50 / 9	45
0.01	l	51		splendid mariposa lily	Calochortus splendens	50 / 9	17
0.01	l	52		coast jepsonia	Jepsonia parryi	30 / 2	15
0.02	b	53		foothill needlegrass	Nassella lepida	30 / 9	20
0.02	r	54		chaparral yucca	Yucca whipplei	5 / 5	31
0.02	b	55		purple head	Acourtia microcephala	5 / 3	19
0.02	l	56		ground pink	Linanthus dianthiflorus	30 / 9	9
0.03	l	57		intermediate sun-cups	Camissonia intermedia	30 / 9	6
0.03	l	58		coast-range melic	Melica imperfecta	99 / 9	42
0.03	l	59		southern honeysuckle	Lonicera subspicata var. denudata	20 / 9	40
0.03	b	60		climbing bedstraw	Galium nuttallii ssp. nuttallii	50 / 9	30
0.03	r	61		hollyleaf redberry	Rhamnus ilicifolia	20 / 9	43
0.04	l	62		southern Indian pink	Silene laciniata ssp. major	2 / 2	19
0.04	l	63		bush monkeyflower	Mimulus aurantiacus	40 / 9	42
0.04	l	64		*windmill pink	Silene gallica	99 / 9	32
0.04	l	65		Parish's purple nightshade	Solanum parishii	30 / 9	20
0.05	l	66		Tejon cryptantha	Cryptantha microstachys	10 / 2	6
0.05	l	67		basketbush	Rhus trilobata	10 / 5	24
0.05	r	68		goldback fern	Pentagramma triangularis ssp. triangularis	99 / 9	24
0.05	l	69		blue larkspur	Delphinium parryi ssp. parryi	30 / 5	12
0.06	r	70		mustang mint	Monardella lanceolata	5 / 1	5
0.06	l	71		San Diego pea	Lathyrus vestitus var. alefeldii	2 / 2	20
0.06	l	72		seashore bentgrass	Agrostis pallens	30 / 3	8
0.07	l	73		*sow thistle	Sonchus oleraceus	20 / 9	39
0.07	l	74		Pacific sanicle	Sanicula crassicaulis	3 / 1	21
0.07	l	75		cobwebby thistle	Cirsium occidentale var. occidentale⁺	3 / 2	7
0.07	r	76		California everlasting	Gnaphalium californicum	99 / 9	42
0.07	b	77		coast live oak	Quercus agrifolia var. agrifolia	5 / 5	42
0.07	r	78		threadstem	Pterostegia drymarioides	20 / 9	29
0.07	r	79		southern miner's lettuce	Claytonia perfoliata ssp. mexicana	30 / 5	25
0.07	r	80		common bedstraw	Galium aparine	30 / 5	39
0.07	r	81		*common chickweed	Stellaria media	30 / 3	28
0.07	r	82		giant wild-rye	Leymus condensatus	1 / 1	27
0.07	b	83		*bull thistle	Cirsium vulgare⁺	2 / 1	16
0.07	r	84		*ripgut brome	Bromus diandrus	30 / 3	51
0.07	r	85		checkerbloom	Sidalcea malviflora ssp. sparsifolia	10 / 3	25
0.07	b	86		johnny jump-up	Viola pedunculata	30 / 3	15
0.07	r	87	ssp	*foxtail barley	Hordeum murinum	10 / 2
0.07	r	88		*hedge mustard	Sisymbrium officinale	5 / 2	20
0.07	r	89	~	basket rush	Juncus textilis	10 / 1	4
0.07	r	90		blue wildrye	Elymus glaucus ssp. glaucus	20 / 9	20
0.07	r	91		white-flowering currant	Ribes indecorum	3 / 3	22
0.08	b	92		goldenrod	Solidago californica	2 / 1	34
0.08	l	93	~	horseweed	Conyza canadensis	10 / 5	35
0.08	l	94		sticky cinquefoil	Potentilla glandulosa ssp. glandulosa	5 / 1	15
0.08	l	95		*prickly lettuce	Lactuca serriola	99 / 9	42
0.08	l	96		long-leaved rush	Juncus macrophyllus	2 / 2	4
0.08	r	97		*California burclover	Medicago polymorpha	30 / 3	41
0.08	l	98		toad rush	Juncus bufonius var. bufonius	50 / 5	12
0.08	l	99		*grass poly	Lythrum hyssopifolia	10 / 2	13
0.08	l			Check for a lupine that appeared here only in 2005
0.08	b	100		western ragweed	Ambrosia psilostachya	10 / 1	36
0.08	b	101		*hairy rattail fescue	Vulpia myuros var. hirsuta	99 / 9	16
0.08	r	102		American vetch	Vicia americana var. americana	2 / 1	9
0.08	b	103		narrow-leaved miner's lettuce	Claytonia parviflora ssp. parviflora	10 / 1	21
0.08	l			(black sage, Salvia mellifera)
0.08	l	104		*knotweed	Polygonum arenastrum	2 / 2	16
0.08	l			Check for Bermuda grass, Cynodon dactylon*, probably sighted here in 2005 but absent in 2006.10228
0.08	l	105		*white-stemmed filaree	Erodium moschatum	10 / 1	22
0.08	l	106		*sourclover	Melilotus indicus	20 / 1	22
0.08	l	107		*Italian rye-grass	Lolium multiflorum	10 / 1	14
0.08	r	108		tree clover	Trifolium ciliolatum	20 / 5	10
0.09	l			(mule fat, Baccharis salicifolia)
0.09	r	109		arroyo willow	Salix lasiolepis⁺	1 / 1	33
0.09	r			Begin bridge over small drainage. In drainage to left: California fuchsia, Epilobium canum ssp. canum; rabbits-foot grass, Polypogon monspeliensis. In drainage to right: deergrass, Muhlenbergia rigens. In drainage on both sides: scarlet monkeyflower, Mimulus cardinalis.
0.09	r	110		dwarf lupine	Lupinus bicolor	50 / 9	29
0.09	r	111		Durango root	Datisca glomerata	1 / 1	6
0.09	b	112		wild tarragon	Artemisia dracunculus	3 / 1	21
0.09				End bridge
0.09	r	113		angel's gilia	Gilia angelensis	10 / 2	14
0.09	r	114		matchweed	Gutierrezia sarothrae	3 / 2	9
0.09	l	115	~	bristly goldenaster	Heterotheca sessiliflora ssp. echioides	1 / 1	7
0.09	l	116		*wall bedstraw	Galium parisiense	20 / 1	7
0.09	l	117		*Crete weed	Hedypnois cretica	20 / 2	22
0.09	l	118		slender madia	Madia gracilis	10 / 2	17
0.10	l	119		long-stemmed buckwheat	Eriogonum elongatum var. elongatum	1 / 1	26
0.10	b	120		three spot	Osmadenia tenella	20 / 2	12
0.10	r	121	~	purple sanicle	Sanicula bipinnatifida	2 / 1	11
0.11				Jct. use trail
0.11				Enter chamise forest
0.11	l			(California bee plant, Scrophularia californica ssp. floribunda)
0.12	l	122		papillate dodder	Cuscuta californica var. papillosa	10 / 3	2
0.12	r	123		common skullcap	Scutellaria tuberosa	10 / 2	5
0.13	l			Jct. faint path; first of many beautiful patches of canchalagua, Centaurium venustum
0.16	l			(common groundsel, Senecio vulgaris)
0.16	l	124		sharp-toothed sanicle	Sanicula arguta	2 / 2	18
0.17	r	125		*long-beaked filaree	Erodium botrys	20 / 3	9
0.17	l	126		*curly dock	Rumex crispus	1 / 1	23
0.17	r	127		rattlesnake weed	Chamaesyce albomarginata	10 / 1	7
0.18	b	128		fringed spineflower	Chorizanthe fimbriata var. fimbriata	99 / 5	7
0.18	b	129		sapphire woolly-star	Eriastrum sapphirinum	99 / 9	7
0.18	l	130		deergrass	Muhlenbergia rigens⁺	5 / 2	21
0.18	r		~	(coyote bush, Baccharis pilularis)
0.19	l			(poison oak, Toxicodendron diversilobum)
0.20	r	131		showy penstemon	Penstemon spectabilis var. spectabilis⁺	3 / 1	11
0.23	r			Jct. driveway into 40 acre inholding.
0.23		132		*Russian thistle	Salsola tragus	1 / 1	25
0.23	r	133		*common groundsel	Senecio vulgaris	2 / 1	19
0.23				Jct. parking lot; elevation 1760 feet (535 m); continue on trail to right.
0.24	l	134		*pineapple weed	Chamomilla suaveolens	10 / 1	19
0.24	r			(California poppy, Eschscholzia californica)
0.24	r			Go through gate; sign: "Trail"
0.24	r	135		cotton-batting plant	Gnaphalium stramineum	30 / 9	14
0.27	r			Sign: "Mountain Lion...".
0.28	l	136		black sage	Salvia mellifera	50 / 9	40
0.29	l	137		purple snapdragon	Antirrhinum nuttallianum ssp. nuttallianum	99 / 9	17
0.29				Begin uphill section
0.33	r	138		California lace fern	Aspidotis californica	20 / 9	9
0.34	l	139		mission manzanita	Xylococcus bicolor	99 / 9	14
0.34	l	140		wild-cucumber	Marah macrocarpus var. macrocarpus	5 / 5	43
0.34				Trail begins series of close-spaced 90° turns; enter forest of hoaryleaf ceanothus, Ceanothus crassifolius, and cross a minor drainage.
0.34	l	141		meally white pincushion	Chaenactis artemisiifolia	50 / 9	14
0.35	l	142		California chicory	Rafinesquia californica	40 / 9	22
0.37	b	143		San Diego wreathplant	Stephanomeria diegensis	30 / 9	20
0.38	r	144		caterpillar phacelia	Phacelia cicutaria var. hispida	30 / 5	15
0.38	l	145		laurel sumac	Malosma laurina	50 / 9	42
0.40				Local high point on trail; elevation 1840 feet (560 m)
0.41	r	146		California peony	Paeonia californica	2 / 2	17
0.42	l	147		sugar bush	Rhus ovata	5 / 5	25
0.43	l			intermediate sun-cups	Camissonia intermedia⁺	/
0.43	r			Jct. use trail
0.43	l			(honking California bee plant, Scrophularia californica ssp. floribunda)
0.43		148		southern California morning-glory	Calystegia macrostegia ssp. arida⁺	10 / 9	17
0.44				Trail is flattish here, but continues to descend
0.44	r			Check for different Vulpia sp.
0.44	r	149		false monkeyflower	Mimulus pilosus	99 / 9	5
0.48	l	150		slender sunflower	Helianthus gracilentus	50 / 9	12
0.48	l	151		thick-leaved yerba santa	Eriodictyon crassifolium var. crassifolium	50 / 9	7
0.49	l			(bird's-foot fern, Pellaea mucronata var. mucronata)
0.50	l	152		tomcat clover	Trifolium willdenovii	20 / 2	17
0.50	r	153		floriferous monkeyflower	Mimulus floribundus	20 / 3	5
0.50	r	154		California popcorn flower	Plagiobothrys collinus var. fulvescens	5 / 1	4
0.50	l	155		*rabbits-foot grass	Polypogon monspeliensis	3 / 1	20
0.51		156		*Bermuda grass	Cynodon dactylon	10 / 1	90
0.52				Local low point on trail, followed by minor local high point then minor local low point
0.53				View of San Jacinto Mountains at 2 o'clock.
0.54	b	157		yellow pincushion	Chaenactis glabriuscula var. glabriuscula	99 / 9	13
0.55				Local high point on trail
0.60	r			(toyon, Heteromeles arbutifolia)
0.60				Cross small drainage; local low point on trail, followed by a series of minor local high and low points
0.60	l	158		clustered toad rush	Juncus bufonius var. congestus	10 / 1	4
0.66	l			Jct. cleared path?
0.67	r	159		western toad rush	Juncus bufonius var. occidentalis	10 / 1	2
0.67	r	160		slender woolly marbles	Psilocarphus tenellus var. tenellus	20 / 1	4
0.67	l	161		Venus looking-glass	Triodanis biflora	10 / 1	2
0.77				Cross small drainage with black culvert
0.77	b	162		shiny lomatium	Lomatium lucidum	2 / 1	7
0.81				Local low point; cross small drainage; elevation ~1750 feet (535 m); climb now steep.
0.90	r			southern California morning-glory	Calystegia macrostegia ssp. arida⁺	/
0.92	l	163		bicolored everlasting	Gnaphalium bicolor	10 / 5	29
0.92	l	164		chaparral beard-tongue	Keckiella antirrhinoides var. antirrhinoides	30 / 9	10
0.92	r	165		San Diego mountain mahogany	Cercocarpus minutiflorus	3 / 2	12
0.97	b	166		California sagebrush	Artemisia californica	10 / 4	46
0.99				First of many local high points; elevation ~1840 feet (560 m)
1.15				Check for different Cuscuta sp.
1.21	b	167		bird's-foot fern	Pellaea mucronata var. mucronata	10 / 9	30
1.21				Cross small drainage.
1.28	b	168		hollyleaf cherry	Prunus ilicifolia ssp. ilicifolia	5 / 1	12
1.30	b	169		common monkeyflower	Mimulus guttatus	20 / 1	13
1.30	l			deergrass	Muhlenbergia rigens	/
1.30	b	170		variegated clover	Trifolium variegatum	20 / 1	4
1.30	b	171		wrinkled rush	Juncus rugulosus	10 / 1	9
1.30	r	172		slim vetch	Vicia ludoviciana var. ludoviciana	5 / 1	8
1.30				Cross dike cutting boulder in trail
1.30				Cross middle of bridge; local low point; elevation ~1755 feet (535 m)
1.30	l	173		California poppy	Eschscholzia californica	2 / 1	29
1.32				Cross small drainage
1.32	l	174		wide-throated yellow monkeyflower	Mimulus brevipes	5 / 1	12
1.32	l	175		rough-seeded blue toad-flax	Linaria canadensis var. texana	1 / 1	10
1.35				Cross small drainage
1.43				View of San Gabriel Mountains at 10 o'clock at a local high point
1.49				Cross small drainage over a black-pipe culvert; elevation ~1755 feet (535 m). Trail now goes upward steeply.
1.54	l	176		chia	Salvia columbariae	20 / 3	21
1.56	l	177		wild canterbury bells	Phacelia minor	20 / 5	21
1.57	r	178		*common cudweed	Gnaphalium luteo-album	/	14
	l	179		short-winged deerweed	Lotus scoparius var. brevialatus⁺	30 / 9	22
1.59	b	180		Coulter's snapdragon	Antirrhinum coulterianum	30 / 9	5
1.59	r	181		California suncup	Camissonia californica	3 / 3	20
1.59	r			Check for new species like a gilia
1.60	r	182		California filago	Filago californica	20 / 9	21
1.68	r			Rock overhang / shelter 5 steps away.
1.68	l	183		twining snapdragon	Antirrhinum kelloggii	5 / 2	6
1.71	l			Jct. Overlook trail; elevation ~1920 feet (585 m). Sign: "To Overlook 0.1 mi [left]; Wiashal Trail [right]"
1.78	l	184		*wild oats (waif?)	Avena fatua	1 / 1	25
1.78				Highest point on trail; elevation ~1950 feet (595 m)
2.01	r			Jct. use trail
2.02				First of two closely-spaced saddles; elevation ~1750 feet (535 m)
2.10	l	185		yellow mariposa lily	Calochortus weedii var. weedii	30 / 9	10
2.12	r	186		white everlasting	Gnaphalium canescens ssp. microcephalum	1 / 1	36
2.12	l	187	~	sand cress	Calyptridium monandrum	10 / 1	12
2.13				Local high point; elevation ~1800 feet (550 m)
2.18				Big patch of sapphire woolly-star, Eriastrum sapphirinum
2.19				Second of two closely-spaced saddles; elevation ~1750 feet (535 m)
2.24	b	188		small-seeded spurge	Chamaesyce polycarpa	20 / 2	13
2.27	l			Jct. blocked-off trail easily visible only on return trip
2.29				Local peak, elevation ~1840 feet (560 m), with a nice flat rock for sitting on, with great views
2.33	l			Jct. trail blocked-off by line of large rocks; note "Eagle Rock" ahead if the light is right.
2.35	l			Jct. Second Overlook Trail. Sign: "To Overlook 0.1 mi [left]; Wiashal Trail [right]". Note "Eagle Rock" has turned into "Turkey Vulture" rock, if you are coming back from the Overlook. Most of the many switchbacks on the descent are not noted.
2.40	l	189		*Italian thistle	Carduus pycnocephalus⁺	2 / 2	18
2.48	r	190		eucrypta	Eucrypta chrysanthemifolia var. chrysanthemifolia	30 / 5	26
2.53	r			Jct. use trail
2.54				Trail turns left 90°
2.56				Switchback right; (blocked-off old trail continues ahead)
2.60	r	191		scaly lipfern	Cheilanthes clevelandii	5 / 1	4
2.62	r			(California four o'clock, Mirabilis californica)
2.64	r	192		wild celery	Apiastrum angustifolium	10 / 2	14
2.75	r	193		California four o'clock	Mirabilis californica	1 / 1	22
2.75				Switchback left; jct. with new trail going uphill
2.78	l	194		odora	Porophyllum gracile	4 / 4	6
2.83	l	195	?	dead like clarkia, seedling like chinese houses	?	10 / 1
2.95	r	196		California polypody	Polypodium californicum	1 / 1	16
2.99	l			5 deergrass plants, Muhlenbergia rigens, above the trail that seem twice normal size since they are above you, instead of their normal position below you in a drainage
2.99	l			(San Diego sedge, Carex spissa)
3.00	r			Jct. blocked-off trail
3.02	l			Sign: "SRPER boundary; Wiashal Trail"
3.19	l	197		*goldentop	Lamarckia aurea	10 / 1	23
3.22	r			Sign: "No motor vehicles"
3.22	l			Sign: "Cole Canyon; (to) Santa Rosa Plateau"
3.22	r			Jct. use trail
3.23	r	198		southern suncup	Camissonia bistorta	3 / 1	11
3.23	l	199		chaparral bush mallow	Malacothamnus fasciculatus	1 / 1	14
3.24				T-jct.; go right; sign on left: "No trespassing PC602(J)"
3.26	l	200		nodding needlegrass	Nassella cernua	3 / 1	19
3.30	b			Jct. trail; sign: "Please stay on trail"
3.30				End trail at T-jct. with a road; elevation 1200 feet (365 m); end plant trail guide; go left to get to the lower trailhead parking on Single Oak Way.
3.34				Road curves right toward back yards of homes
3.36				Trail curves left and parallels back yards of homes
3.41				Y-jct with path; stay right
3.45				Leave road and head toward access in fence
3.49				Cul-de-sac near end of Single Oak Way

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Plant Trail Guides For The Santa Rosa Plateau
Field Guide to the Santa Rosa Plateau: Plants

Copyright © 2002-2006 by Tom Chester and Kay Madore.
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
http://tchester.org/srp/plants/guides/wiashal.html
Comments and feedback: Tom Chester
Updated 19 April 2006.