Plant Guide to East Grade Project Trail, Cleveland National Forest, Palomar Mountain

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

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


(Most of intro to be added.)

Directions to trailhead: the easiest way for most people is probably to go up the East Grade Road (S7) from its southwest end at SR76, which is immediately west of the dam for Lake Henshaw. See Thomas Brothers Map 409 H8 for San Diego County.

The parking area is somewhat obscure, and hard to find sometimes even for people who have been there previously. The Cleveland National Forest Parking Area is immediately east of mile marker 6.00 on the East Grade Road, on the north side. On the east side of the parking area is the gated road for this route.

WGS84 coordinates for the trailhead are:

3960 feet

NAD27 coordinates for the trailhead are:


NAD27 is the coordinate system datum used by USGS topographic maps; WGS84 is the coordinate system datum used by most GPS receivers unless you have reset yours. The sets of coordinates given here aren't exact translations, but result from reading the position of the trailhead, as located by my mouse, on two different times.

The road descends at first, heading toward this position:



This position is just given to make you feel confident you are heading in the right direction on the right road; the trail curves to the left after reaching the rough area of this position.

This list resulted from a fairy quick initial reconnaissance of this trail ("drive-by botanizing"). As a result, it is definitely incomplete, especially near the beginning, and may contain a few erroneous identifications. The first occurrence of many species is earlier than given here.

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. We had 62 trails in our database when this histogram was made. A number of "1" means the taxon has only been found on this trail among the trails in our database.

Number of Trails
Containing A Taxon
Number Of Taxa
On This Trail
% of Taxa
On This Trail
Total Taxa117100%

We found 7 additional species not in the above table, since they have not been identified yet. The unidentified ones are marked with ? or sp in the id? column in the guide.

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 DateVisit ## taxa# "?"# "sp"# "~"# "ssp"

The Plant Guide

Version for printing, without lines and other text on this page (6 pages)

Mile#Sid?Common NameLatin Name#here#all
0.00   Begin hike at Cleveland National Forest Parking Area immediately east of mile marker 6.00 on the East Grade Road, north side. This guide is not our usual Trail Plant Guide; it lists only some of the plants along the route noted on a single fairly high-speed walk. Many of the first occurrences of these species are earlier than noted here. The first part of the trail is downhill.
0.001b Coulter pinePinus coulteri50 / 98
0.002r *ripgut bromeBromus diandrus / 30
0.003rspsouthern montane grape lupineLupinus excubitus var. austromontanus5 / 12
0.004r golden yarrowEriophyllum confertiflorum var. confertiflorum / 30
0.005l climbing bedstrawGalium nuttallii ssp. nuttallii / 13
0.006b California thistleCirsium occidentale var. californicum40 / 97
0.007l California-asterLessingia filaginifolia var. filaginifolia99 / 932
0.008rspgrand mountain dandelionAgoseris grandiflora10 / 97
0.009rsspsticky cinquefoilPotentilla glandulosa10 / 92
0.0010rsspnarrowleaf bedstrawGalium angustifolium ssp. angustifolium / 31
0.0011r *slender wild oatsAvena barbata / 18
0.01   Gate with sign: "Road Closed" (for vehicles)
0.0112r Mexican manzanitaArctostaphylos pungens30 / 92
0.0113r canyon live oakQuercus chrysolepis30 / 915
0.0114b Palmer's ceanothusCeanothus palmeri10 / 94
0.0115r~goldenstarBloomeria crocea / 5
0.0116r~Parish's rupertiaRupertia rigida5 / 51
0.0117bsspblue wildryeElymus glaucus ssp. glaucus30 / 913
 18r white firAbies concolor / 11
 19r goldenrodSolidago californica30 / 318
 20rssp*rattail fescueVulpia myuros var. myuros / 9
 21r slender sunflowerHelianthus gracilentus10 / 17
 22r leafy daisyErigeron foliosus var. foliosus30 / 526
 23r poison oakToxicodendron diversilobum / 28
 24r southern honeysuckleLonicera subspicata var. denudata50 / 925
 25l bristly bird's beakCordylanthus rigidus ssp. setigerus20 / 918
 26r~*narrowleaf filagoFilago gallica / 26
 27l Spanish cloverLotus purshianus var. purshianus50 / 913
 28r yarrowAchillea millefolium20 / 95
 29l *soft chessBromus hordeaceus / 24
 30r silver puffsUropappus lindleyi20 / 915
 31l slender madiaMadia gracilis20 / 26
 32r mugwortArtemisia douglasiana / 20
 33lsptomcat cloverTrifolium willdenovii10 / 18
 34l California black oakQuercus kelloggii / 8
 35l California sweet-cicelyOsmorhiza brachypoda30 / 54
 36r chaparral whitethornCeanothus leucodermis / 8
 37l southern coast live oakQuercus agrifolia var. oxyadenia / 5
 38r western ragweedAmbrosia psilostachya50 / 922
 39lsspsquirreltailElymus elymoides / 3
    Tree down on road; go to the right around it.
 40rsspSan Felipe monardellaMonardella nana ssp. leptosiphon10 / 11
 41l southern tauschiaTauschia arguta1 / 13
 42l one-sided bluegrassPoa secunda ssp. secunda30 / 918
 43l~western morning-gloryCalystegia occidentalis ssp. fulcrata10 / 25
 44l southern mule's earsWyethia ovata5 / 14
 45lspBishop's lotusLotus strigosus2 / 117
 46lspsilky lotusLotus heermannii var. heermannii5 / 56
 47l?Wright's buckwheatEriogonum wrightii1 / 12
 48l white everlastingGnaphalium canescens ssp. microcephalum10 / 526
 49l *downy bromeBromus tectorum / 17
 50l holly-leaf navarretiaNavarretia atractyloides99 / 92
 51lsspslender cottonweedMicropus californicus var. californicus20 / 15
 52l flax-flowered linanthusLinanthus liniflorus5 / 12
 53l common linanthusLinanthus parviflorus5 / 15
 54l splendid mariposa lilyCalochortus splendens5 / 211
 55l autumn willowweedEpilobium brachycarpum1 / 11
 56l *redstem filareeErodium cicutarium / 30
 57l *English plantainPlantago lanceolata50 / 912
 58r squawbushRhus trilobata2 / 112
 59c *pineapple weedChamomilla suaveolens / 12
 60l coast Indian paintbrushCastilleja affinis ssp. affinis1 / 13
 61l birch-leaf mountain-mahoganyCercocarpus betuloides var. betuloides1 / 113
0.4462l deergrassMuhlenbergia rigens1 / 111
0.4463l western sycamorePlatanus racemosa / 16
0.4464b velvet ashFraxinus velutina1 / 13
0.4465l diamond-petaled clarkiaClarkia rhomboidea20 / 13
0.4466l few-flowered heterocodonHeterocodon rariflorum10 / 11
0.4467l California wild roseRosa californica10 / 29
0.4468b ocellated Humboldt lilyLilium humboldtii ssp. ocellatum5 / 12
0.4469l cotton-batting plantGnaphalium stramineum5 / 17
0.4470l Durango rootDatisca glomerata5 / 12
0.4471lssptoad rushJuncus bufonius / 1
0.4472r purple clarkiaClarkia purpurea ssp. quadrivulnera3 / 112
0.4473r large-flowered collomiaCollomia grandiflora5 / 22
0.4474r California wood fernDryopteris arguta1 / 16
0.4475l~small-head field cloverTrifolium microcephalum3 / 14
0.44   Cross first creek
0.4476r western choke-cherryPrunus virginiana var. demissa1 / 15
0.4477l~cows cloverTrifolium wormskioldii5 / 13
0.4478lspiris-leaved rushJuncus sp.5 / 1 
0.4479lspscarlet monkeyflowerMimulus cardinalis115
0.4480l white bluecupGithopsis diffusa ssp. candida+5 / 11
0.4581lssphoary coffeeberryRhamnus tomentella ssp. tomentella1 / 12
 82lsspwhorledleaf penstemonKeckiella ternata var. ternata5 / 55
 83l saw-toothed goldenbushHazardia squarrosa var. grindelioides5 / 523
 84rspPacific sanicleSanicula crassicaulis5 / 19
 85lsprein orchidPiperia sp.1 / 1 
 86l triangular-fruit sedgeCarex triquetra1 / 110
 87l *red bromeBromus madritensis ssp. rubens / 30
0.4988lsspwestern vervainVerbena lasiostachys5 / 12
0.4989l~Pacific rushJuncus effusus var. pacificus1 / 13
0.4990lspupright knotweedPolygonum sp.1 / 1 
0.4991l willowherbEpilobium ciliatum ssp. ciliatum1 / 110
0.49   Cross second creek.
0.4992lspspeedwellVeronica sp.1 / 1 
0.4993lspslimy monkeyflowerMimulus sp.1 / 1 
0.4994l winter cressBarbarea orthoceras5 / 14
0.4995l little spring beautyClaytonia exigua ssp. exigua5 / 13
0.4996lsspfragrant everlastingGnaphalium canescens ssp. beneolens1 / 12
0.4997l annual malacothrixMalacothrix clevelandii20 / 12
0.4998l?green dock?Rumex sp.?5 / 1 
0.4999l California chicoryRafinesquia californica1 / 114
0.49100l threadstemPterostegia drymarioides5 / 113
 101b sticky false-giliaAllophyllum glutinosum20 / 34
0.57102l lesser paintbrushCastilleja minor ssp. spiralis1 / 11
0.57   Cross drier drainage with a small meadowy area.
0.57103l southern bluecurlsTrichostema austromontanum ssp. austromontanum10 / 11
0.57104l canchalaguaCentaurium venustum10 / 14
0.57105l western marsh cudweedGnaphalium palustre10 / 11
0.57106l false monkeyflowerMimulus pilosus10 / 11
0.57   The next four species were off-trail along the drainage
0.57107l southern skullcapScutellaria bolanderi ssp. austromontana10 / 12
0.57108lsspcheckerbloomSidalcea malvaeflora ssp. sparsifolia5 / 513
0.57109r California buttercupRanunculus californicus+10 / 15
0.57110r superb mariposa lilyCalochortus superbus3 / 11
0.58   Y-jct at low point on road. Go left along the obvious road, uphill; the road to the right is obscure.
0.58111l~twiggy wreath plantStephanomeria virgata5 / 18
0.58112b Patagonia plantainPlantago patagonica30 / 11
0.58113l *wall bedstrawGalium parisiense10 / 11
0.58114b popcorn flowerCryptantha intermedia20 / 117
 115rspParish' Jacumba milk-vetchAstragalus douglasii var. parishii1 / 12
    The next portion of the guide is even more incomplete, since we were hurrying to get to the turnaround point.
0.69116l California everlastingGnaphalium californicum1 / 120
0.78117r blue dicksDichelostemma capitatum ssp. capitatum2 / 126
0.84118l scarlet buglerPenstemon centranthifolius1 / 16
0.89119lspyellow mariposa lilyCalochortus weedii var. weedii5 / 36
 120lspvioletViola sp.1 / 1 
 121l California coffeeberryRhamnus californica ssp. californica1 / 111
 122r Parish's purple nightshadeSolanum parishii1 / 18
 123r dove weedEremocarpus setigerus5 / 19
 124l mule fatBaccharis salicifolia1 / 125
0.99   Turnaround; return to trailhead.

Comments On Specific Species

Githopsis diffusa ssp. candida. The upper stems on these plants are 0.5-0.6 mm wide, and the corollas are 4.5 mm, making them ssp. candida using the Jepson Manual key. However, the corolla lobes are 1.5 mm, and ovary is 3.1-4.2 times longer than wide, which are typical of ssp. filicaulis and outside the ranges given for ssp. candida in the Jepson Manual.

Ranunculus californicus. These plants are clearly R. californicus, with the following distribution of the number of petals per flower:

# PetalsFrequency

In contrast, the Ranunculus occidentalis at Palomar Mountain State Park has a strong peak at 5 petals in its histogram.

We thank an anonymous person for their assistance in finding species on our 7/03/03 visit.

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Copyright © 2003-2005 by Tom Chester, Wayne Armstrong and James Dillane.
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
Comments and feedback: Tom Chester | Wayne Armstrong
Updated 15 July 2005.