Panorama of Hellhole Canyon, Flatcat Canyon, and the Hellhole Canyon alluvial fan © Mike Crouse (labeled version)
Hellhole Palms © Tom Chester
Flora of Culp Valley / Hellhole Canyon
Maidenhair Falls © Rick Halsey
Hellhole Canyon and Culp Valley are a natural floral unit, since the upper part of Hellhole Canyon is most-easily accessed via Culp Valley. The main access road to Borrego Springs in this area travels through Culp Valley and ends at the bottom of Hellhole Canyon. One of the main hiking trails in this area, the California Riding and Hiking Trail, goes from Culp Valley to the bottom of Hellhole Canyon.
Culp Valley is the first part of Anza-Borrego Desert State Park encountered by visitors traveling along S22 from Ranchita and the Montezuma Valley. You enter Anza-Borrego Desert State Park just before the road crests at the lip of the Salton Sea erosional basin and you travel down the Montezuma Grade. This is a very dramatic way to enter the park, with terrain so challenging that no road was built until S22 was finished in 1964 after ten years of construction.
The first five miles of S22 past the crest, from mile marker 6.5 to 11.6 on S22, is in Culp Valley. There is a popular campground, the Culp Valley Primitive Campground, at a turnoff near mile marker 9.2 on S22. After mile marker 11.6, the road descends into Culp Canyon, and then heads northeast along the east side of the ridge separating Hellhole Canyon from the southern part of Borrego Valley.
Immediately before the final sweeping curve to the right on S22, just before S22 meets Palm Canyon Road (turnoff to Visitor Center) at the base of Hellhole Canyon on the western outskirts of Borrego Springs, there is a large parking lot, with two restrooms, on the left (west side of S22). (See map here.) This is the parking lot for the Hellhole Canyon Trail, and for Little Surprise Canyon, as well as another access point for the California Hiking and Riding Trail.
Hellhole Canyon is one of the more popular areas of Anza-Borrego Desert State Park. The five mile roundtrip hike to Maidenhair Falls and the Hellhole Palms, with flowing water most of the year, is the top attraction. The Visitor Center often directs non-hikers to Little Surprise Canyon, right next to the Hellhole Canyon parking area, for a good wildflower show in the spring that can be enjoyed with very little walking.
The lower part of the California Hiking and Riding Trail crosses the base of the Hellhole Canyon alluvial fan, beginning at the southeast corner of the Visitor Center parking lot and crossing the Hellhole Canyon Trail, and traveling up the south wall of Hellhole Canyon to Culp Valley.
This checklist is only a start at the flora of this Canyon, since many of the entries come from vouchers I haven't yet reviewed, and I haven't yet vouchered all of the new records I have found so that my determinations can be reviewed. This checklist can only be considered a decent flora after I finish both of those tasks. This checklist will be revised as I work on both of those tasks.
Hellhole Canyon is west of Borrego Springs; Culp Valley is a flattish valley above the south wall of Hellhole Canyon:
The boundaries of this Flora are shown in more detail in the map below:
The Culp Valley Floral Area includes Culp Valley itself, plus the following areas:
- the area to the west extending up to the lip of its erosional basin at the east edge of Montezuma Valley at ~4600 feet elevation (Ranchita is in the Montezuma Valley).
- the area to the south up to Pinyon Ridge, reaching a peak elevation of 4573 feet at Wilson Peak. The Floral Area boundary is drawn a bit south of the ridgeline, since Pinyon Ridge is accessed by a Jeep Trail from Culp Valley.
- the area to the east down to the 3000 foot elevation contour.
- the area to the north down to the 3000 foot elevation contour, including most of the South Fork of the Hellhole River, accessed by a Jeep Trail from Culp Valley.
Culp Valley itself extends down to 2800 feet elevation, where Culp Canyon begins.
The total elevation range for the Culp Valley Floral Area is 2800 - 4600 feet.
The Hellhole Canyon Flora Area follows the drainage basin of Hellhole Canyon up to an elevation of 3000 feet, extending to the ridge containing Panorama Outlook on the north, the 3000 foot contour in the west and southwest, and following the top of the ridge extending from Culp Valley to Borrego Springs on the southeast. The latter ridge divides the drainage to Hellhole Canyon and the drainage to the portion of the Borrego Valley that is south of Christmas Circle in Borrego Springs.
The total elevation range for the Hellhole Canyon Area is 835 feet at the Visitor Center to 3000 feet.
The following map shows the areas surveyed so far that are included in the checklist below:
Note that very little of Culp Valley has been surveyed so far, being only covered by most of the top part of the California Riding and Hiking Trail.
The checklist below contains separate entries for the species found in each of these areas:
- Little Surprise Canyon, surveyed along the maze of routes shown in the map above. Its flora is also given separately.
- Hellhole Canyon Trail, to a bit beyond Maidenhair Falls and the Hellhole Palms. See also its detailed plant trail guide.
- The California Riding and Hiking Trail, from the Visitor Center to its intersection with the trail from the Culp Valley Primitive Camp, along with the road to S22 from that intersection. Separate entries are given in the checklist below for the top portion of this route, above a saddle at an elevation of 2580 feet, and for the bottom portion. Note that this dividing saddle is not exactly at the boundary between the two floral areas, but it is close.
See also the detailed plant trail guides for the top part and bottom part. Note that these guides are to the entire trail, one for each direction, but the checklist below uses only the part of each guide above and below the 2580 foot saddle. The saddle is at mile 2.38 on the way down, and mile 3.10 on the way up.
Procedure For Compiling The Checklist
The Checklist was compiled from field work done by myself and coworkers, and from online vouchers.
The checklist from our field work was compiled using the results up to and including 15 January 2010, which consisted of a total of 17 different full days of field work with a total of 40 people-days. The largest number of trips were done by the following people:
# field days Person 17 Tom Chester 5 Kay Madore 3 Mike Crouse 2 Wayne Armstrong and Paula Knoll
People devoting one day to a survey were: James Dillane, Michael Charters, RT Hawke, Shaun Hawke, Aaron Schusteff, Kate Shapiro, Pam Pallette, Vince Balch, Preston Taylor, and Richard Sapiro.
The surveys were all done in the non-prime time of December and January, except for one survey of Hellhole Canyon on 25 March 2005 and one survey of Little Surprise Canyon on 1 April 2008. See the links immediately above for detailed information about the area covered, the dates of coverage, and the participants, for each of the surveyed sections.
The following table gives the number of species found in each area, the total number and the total number fairly confidently identified, along with elevation ranges and miles covered in each survey area, in order of descending elevation of the survey:
Survey # miles Elevation (feet) # Taxa # Identified Taxa Min Max California Riding and Hiking Trail Top Part 2.38 2580 3520 93 84 California Riding and Hiking Trail Bottom Part 3.10 835 2580 111 106 Hellhole Canyon Trail 2.65 880 2040 187 182 Little Surprise Canyon ~2.25 880 1080 97 96
Because most of the trips were done in December and January, some of the species found could not be fully identified, although they could be distinguished in the field. These species were usually dead plants from the previous year, but sometimes were babies of the current year. Examples are species in the following genera: Datura, Nemacladus, Cryptantha, Lupinus. Observations of those species are not present in the checklist below, which contains only the fairly-confidently-identified taxa. Hence those surveys should not be considered as complete records of all the species in the area surveyed.
Most of these taxa are almost certainly identified correctly, but a small percentage of the fairly-confidently-identified taxa are what I call 95% confidence taxa. These are ones that are highly likely to be the determined taxa, but did not have flowers or fruit to make the determination 100%. One would expect that up to 5% of such species might turn out to be incorrectly identified.
One taxon, the Lycium species in Hellhole Canyon, could not be determined any further in the field, since there were no flowers on any of the plants. It was placed as L. andersonii in the checklist below, solely since that is the only Lycium species vouchered or observed in this area. That placement may of course be incorrect.
Altogether, 246 separate taxa were found in these surveys.
The vouchers were obtained from searches of the Consortium of California Herbaria on 19 January 2010.
The Consortium database was searched for the subset of vouchers with coordinates using a rectangle with corners of (33.264,-116.456) and (33.231, -116.406) for Hellhole Canyon, and another rectangle with corners of (33.234, -116.504) and (33.174, -116.433) for Culp Valley. In addition, the database was searched for all vouchers, with and without coordinates, containing one of the following words in the locality field: Hellhole, Hell hole, Flatcat, Flat cat, and Culp. Searches were also made using the name of springs in Culp Valley, but no additional vouchers were retrieved.
In addition, a separate search was made for every taxon found in the field surveys that had no vouchers found in either area. This did not result in any additional vouchers for this area, making it likely that the previous searches were highly complete.
Duplicate vouchers were then eliminated. The locality field in each remaining voucher was then manually reviewed, and the vouchers were placed in the Culp Valley Floral Area, the Hellhole Canyon Floral Area, or were discarded if they were from another area. Vouchers from Culp Canyon were discarded, since they are outside the Culp Valley Area defined here.
Two vouchers of Chinese privet, Ligustrum sinense, were removed from further consideration, since they were found only near an old homestead in Culp Valley and this species is not otherwise known to be reproducing in the wild in southern California.
The determination on one voucher of Quercus john-tuckeri was treated as a voucher of Q. cornelius-mulleri, since that is a highly-likely misdetermination.
A total of 369 vouchers were found, 85 from the Hellhole Canyon Area and 284 from the Culp Valley area.
Altogether, 202 separate taxa were found in these vouchers, 60 from Hellhole Canyon and 167 from Culp Valley.
The top collectors for Hellhole Canyon were:
# Vouchers % Vouchers Collector(s) 22 26 Larry Hendrickson 15 18 Carl Epling, Wm. Robison 13 15 R. Mitchel Beauchamp (10 with R. C. Pierce)
The top collectors for Culp Valley were:
# Vouchers % Vouchers Collector(s) 101 36 Frank F. Gander 22 8 Melvin M. Sweet 18 6 Michael G. Simpson 14 5 Bill Sullivan 12 4 CRES Native Seed Gene Bank, J Dunn, L Lippitt, S Anderson 11 4 Richard Mallory 11 4 Suzanne Bell 10 4 C. W. Tilforth, John Dourley 10 4 Kim Marsden, with Ruth Otis, R. Ehly, G. Clark, M. J. Churchwell
Please note the following important caveats about this preliminary Checklist:
- I have not looked at any of the vouchers yet, so I cannot vouch for their determinations. I have checked only the names of the taxa to make sure it was not unreasonable for them to occur here.
- Some taxa present in the checklist only from our observations have not been 100% identified yet, since they were never observed in bloom.
- Several of the surveyed areas are incomplete for annuals and perennials, since they have not yet been covered at prime time.
- This checklist is very incomplete for Culp Valley, since no dedicated survey has ever been done there in prime time. (Our single survey trail there was covered only in January so far.) Most of the entries come from widely-scattered vouchers, and most of the area of Culp Valley has not been botanized. (See the numbers below.)
- The checklist is somewhat incomplete for Hellhole Canyon, since most of the Canyon has not been covered by surveys in prime time. However, this checklist is a good start toward its flora, since several areas there have been covered in prime time.
- This is a very preliminary first draft Checklist, compiled quickly and without review by other knowledgeable botanists, and so well may contain bonehead errors.
Checklist for Culp Valley / Hellhole Canyon
This checklist contains 328 taxa, with 204 recorded in the Culp Valley area and 238 recorded in the Hellhole Canyon area.
The composition of the checklist is very different in the two areas. Since three of our surveys were done in the Hellhole Canyon area, and very few vouchers have been collected from there, the vast majority of the Hellhole Canyon portion of the checklist comes from our surveys. Of the 238 Hellhole Canyon Taxa, 232 were from our surveys and 60 were from vouchers.
In contrast, only one of our surveys was done in the Culp Valley area, and it was done only in January. It therefore is missing a lot of the annual and perennial species. Of the 204 Culp Valley taxa, 84 were from our surveys and 167 were from vouchers. As mentioned above, a lot of Culp Valley has not yet been botanized, so this checklist is very incomplete for Culp Valley.
One of the entries in the checklist, Descurainia pinnata, is not distinct from the two subspecies also given in the checklist. It has been given separately to indicate that this species was recorded in one of the surveys, but could not be determined to subspecies since the plants were dead.
Notes on some species in the checklist:
- The most common cholla by far in Culp Valley and Hellhole Canyon is Opuntia ganderi. O. parryi lives almost entirely to the west of Montezuma Valley. The voucher of O. parryi was found at 4140 feet elevation at the intersection of the Jasper Trail and Old Culp Valley Road. It is not unexpected that there would be some interlopers of O. parryi at the higher elevations in this Floral Area.
- The Opuntia vaseyi in the checklist is the same as everyone else's O. phaeacantha. I have yet to see anywhere in southern California a single prickly pear with the white style and white filaments used to key out O. phaeacantha in the Jepson Manual. The flowers of the specimens here are indistinguishable in that respect from the flowers of O. vaseyi on the coastal side of the mountains.
I make the working list available online for two reasons. First, I know others will appreciate having such a list, even if it is preliminary. Second, I hope I will get feedback from others who find errors or omissions in this list.
The Checklist is sorted first by category - ferns, dicots, and monocots - and then by family and scientific name. The Family and Scientific Name are from the Jepson Manual, with the Family being given by the first three letters. See Plant Family Abbreviations to decode the abbreviations. An asterisk before the Common Name indicates a non-native taxon.
There are four columns that follow the name for each taxa, one for each of the surveyed areas. Each column gives a rough estimate of the number of plants, and the number of locations for each species, in each surveyed area (#Plants / #Locations). Maximum values are 99 plants, and 9 locations. The main intent of this column is to indicate the species for which very few plants or locations were found. These are not just values that correspond to plants within touching distance of the trail, as given in my plant trail guides; these include plants seen in the area around each trail, as given in my floras.
The next two columns give the number of vouchers (# Vouchers) found in the Hellhole Canyon Area and the Culp Valley Area.
The surveyed areas are all in the Hellhole Canyon Floral Area except for the top portion of the California Riding and Hiking Trail (CA R&H), which is mostly, but not entirely, in the Culp Valley Floral Area.
The presentation of the surveyed areas in the table from left to right is in declining order of maximum elevation: 3520-2580; 2580-835; 2040-880; 1080-880 feet for CA R&H top; CA R&H bottom; Hellhole; and Little Surprise, respectively.
The elevation range for the Culp Valley Floral Area is 2800-4600 feet. The elevation range for the Hellhole Canyon Area is 835-3000 feet.
This is a working list, about which I make no guarantees at all until I officially release it. Use at your own risk!
Version for printing, without lines and other text on this page: html (12 pages) or pdf Clickbook booklet (3 double-sided page). (See printing instructions for an explanation of these options)
# FAM Scientific Name (*)Common Name #Plants / #Locations # Vouchers CA R&H Hell-
Top Bot. 1 PTE Adiantum capillus-veneris maidenhair fern 99/2 2 PTE Cheilanthes covillei beady lipfern 30/9 30/3 20/2 1 2 3 PTE Cheilanthes parryi woolly lipfern 1/1 50/9 40/7 30/5 2 4 PTE Cheilanthes viscida sticky lipfern 5/2 5 PTE Notholaena californica California cloak fern 2/1 1 6 PTE Pellaea mucronata var. mucronata bird's-foot fern 2/2 1 7 SEL Selaginella eremophila desert spike-moss 50/9 10/1 1 8 CUP Juniperus californica California juniper 16/7 99/5 20/4 9 EPH Ephedra sp. (2 lv'd; E. aspera?) 2 lv'd ephedra 2/2 30/5 10 ACA Carlowrightia arizonica Arizona carlowrightia 3/2 1 11 ACA Justicia californica chuparosa 50/7 99/9 50/9 1 1 12 AMA Amaranthus fimbriatus fringed amaranth 99/9 40/5 10/9 1 13 ANA Rhus ovata sugar bush 50/9 20/7 2 14 ANA Rhus trilobata basketbush 1 15 API Apiastrum angustifolium wild celery 5/1 1 16 API Daucus pusillus rattlesnake weed 20/3 1 17 API Tauschia arguta southern tauschia 4 18 ASC Matelea parvifolia spearleaf 2/1 1 19 ASC Sarcostemma cynanchoides ssp. hartwegii climbing milkweed 30/3 20 AST Adenophyllum porophylloides San Felipe dogweed 20/7 20/9 30/9 1/1 1 21 AST Ambrosia dumosa burroweed 1/1 99/9 99/9 50/9 22 AST Ambrosia psilostachya western ragweed 99/1 23 AST Anisocoma acaulis scale-bud 1 24 AST Artemisia ludoviciana ssp. albula white mugwort 20/9 1/1 20/3 25 AST Artemisia ludoviciana ssp. ludoviciana silver wormwood 10/2 26 AST Artemisia tridentata ssp. tridentata big sagebrush 1 27 AST Baccharis salicifolia mule fat 5/3 1 28 AST Baccharis sergiloides desert baccharis 30/7 2 29 AST Bebbia juncea var. aspera sweetbush 20/9 20/9 50/9 20/9 30 AST Brickellia arguta var. arguta California spear-leaved brickellia 3/3 1/1 31 AST Brickellia californica California brickellbush 2 32 AST Brickellia desertorum desert brickellia 1/1 33 AST Brickellia frutescens shrubby brickellia 15/6 26/2 2 34 AST Calycoseris wrightii white tackstem 20/9 35 AST Chaenactis carphoclinia var. carphoclinia pebble pincushion 99/9 99/9 36 AST Chaenactis fremontii Fremont pincushion 99/9 99/9 1 1 37 AST Chaenactis glabriuscula var. glabriuscula yellow pincushion 3 38 AST Cirsium scariosum elk thistle 1 39 AST Conyza canadensis horseweed 1/1 40 AST Coreopsis californica var. californica California coreopsis 1 41 AST Dimorphotheca sinuata *African daisy 1/1 42 AST Encelia actoni Acton encelia 99/9 2 43 AST Encelia farinosa brittlebush 20/4 99/9 99/9 40/9 2 44 AST Ericameria brachylepis boundary goldenbush 40/9 30/5 1/1 1 45 AST Ericameria cuneata var. spathulata wide-leaved rock goldenbush 2 46 AST Ericameria linearifolia narrowleaf goldenbush 99/9 1/1 6 47 AST Eriophyllum confertiflorum var. confertiflorum golden yarrow 5/1 48 AST Eriophyllum wallacei Wallace's woolly daisy 99/9 4 2 49 AST Filago californica California filago 99/9 1 50 AST Filago depressa dwarf filago 20/5 51 AST Gnaphalium bicolor bicolored everlasting 2/2 52 AST Gnaphalium canescens ssp. canescens white everlasting 1 53 AST Gnaphalium canescens ssp. microcephalum white everlasting 1 54 AST Gnaphalium luteo-album *common cudweed 5/1 55 AST Gutierrezia californica California matchweed 99/9 50/5 1 56 AST Hymenoclea salsola var. salsola cheesebush 99/7 50/7 99/9 20/5 1 57 AST Lactuca serriola *prickly lettuce 5/1 58 AST Lasthenia californica goldfields 2/1 7 59 AST Layia glandulosa white tidy-tips 2 60 AST Lessingia glandulifera var. glandulifera sticky lessingia 1 61 AST Malacothrix clevelandii annual malacothrix 1 62 AST Malacothrix glabrata desert dandelion 5/2 99/9 20/5 1 1 63 AST Monoptilon bellioides desert star 99/9 10/3 2 64 AST Pectis papposa var. papposa chinch-weed 20/2 40/9 30/9 65 AST Perityle emoryi Emory's rock-daisy 20/9 20/9 50/9 1 66 AST Pleurocoronis pluriseta arrow-leaf 1/1 67 AST Pluchea sericea arrow-weed 5/1 68 AST Porophyllum gracile odora 2/2 5/3 1/1 69 AST Rafinesquia californica California chicory 1 70 AST Rafinesquia neomexicana desert chicory 10/9 30/9 1 1 71 AST Senecio californicus California groundsel 1 72 AST Senecio flaccidus var. monoensis Mono ragwort 3 73 AST Senecio mohavensis Mojave ragwort 50/9 5/1 30/9 74 AST Solidago californica goldenrod 40/2 75 AST Sonchus asper ssp. asper *prickly sow thistle 2/1 76 AST Sonchus oleraceus *sow thistle 1/1 77 AST Stephanomeria exigua ssp. exigua slender wreathplant 20/4 1/1 78 AST Stephanomeria pauciflora var. pauciflora wire-lettuce 50/9 30/9 99/9 5/3 2 79 AST Trichoptilium incisum yellow-head 20/4 10/1 80 AST Trixis californica var. californica California trixis 1/1 25/9 50/9 5/3 2 2 81 AST Uropappus lindleyi silver puffs 1/1 2/1 82 AST Viguiera parishii Parish's viguiera 99/9 30/9 50/7 2/1 2 1 83 BIG Chilopsis linearis ssp. arcuata desert-willow 99/9 84 BOR Amsinckia menziesii var. intermedia common fiddleneck 99/9 2 85 BOR Amsinckia menziesii var. menziesii small-flowered fiddleneck 20/2 10/1 86 BOR Amsinckia tessellata var. tessellata bristly fiddleneck 99/9 87 BOR Cryptantha angustifolia narrow-leaved cryptantha 99/9 88 BOR Cryptantha barbigera bearded cryptantha 99/9 20/9 1 1 89 BOR Cryptantha intermedia popcorn flower 1 1 90 BOR Cryptantha maritima Guadalupe cryptantha 99/9 99/9 1 91 BOR Cryptantha micrantha purple-root cryptantha 3 92 BOR Cryptantha muricata prickly cryptantha 1 93 BOR Cryptantha pterocarya wing-nut cryptantha 30/9 1 94 BOR Pectocarya heterocarpa chuckwalla pectocarya 20/1 95 BOR Pectocarya penicillata combseed 1 96 BOR Pectocarya recurvata curvenut combseed 99/9 97 BOR Pectocarya setosa moth combseed 1 98 BOR Plagiobothrys arizonicus Arizona popcorn flower 1 99 BRA Arabis perennans perennial rock-cress 3/1 1 100 BRA Athysanus pusillus dwarf athysanus 1 101 BRA Brassica tournefortii *Asian mustard 20/3 20/9 99/9 99/9 1 102 BRA Caulanthus simulans Payson's wild cabbage 2 103 BRA Descurainia pinnata western tansy-mustard 30/5 104 BRA Descurainia pinnata ssp. glabra smooth western tansy-mustard 20/1 1 105 BRA Descurainia pinnata ssp. halictorum alkali western tansy-mustard 99/9 1 1 106 BRA Draba cuneifolia wedge-leaved draba 1 107 BRA Erysimum capitatum ssp. capitatum western wallflower 1 108 BRA Guillenia lasiophylla California mustard 10/1 2 1 109 BRA Lepidium lasiocarpum var. lasiocarpum hairy-podded pepper-grass 99/9 99/9 50/9 110 BRA Lyrocarpa coulteri var. palmeri Coulter's lyrepod 20/3 1/1 1/1 1 111 BRA Rorippa nasturtium-aquaticum water cress 10/1 112 BRA Sisymbrium irio *London rocket 5/2 1 113 BRA Sisymbrium orientale *Oriental mustard 10/2 114 BRA Thysanocarpus curvipes fringe-pod 1 115 BRA Thysanocarpus laciniatus lace-pod 1 116 CAC Echinocereus engelmannii Engelmann's hedgehog cactus 15/5 99/9 40/9 1/1 1 117 CAC Ferocactus cylindraceus California barrel cactus 2/2 99/9 20/3 20/9 118 CAC Mammillaria dioica California fish-hook cactus 38/9 2/1 5/5 1 119 CAC Opuntia basilaris var. basilaris beavertail cactus 30/9 99/9 99/9 5/5 4 120 CAC Opuntia bigelovii teddy-bear cholla 99/5 99/9 1/1 121 CAC Opuntia ganderi Gander's cholla 99/9 99/9 99/9 50/9 2 122 CAC Opuntia parryi cane cholla 1 123 CAC Opuntia vaseyi Vasey's prickly-pear 15/3 17/3 124 CAM Nemacladus rubescens desert nemacladus 3/1 2 125 CAP Isomeris arborea bladderpod 40/5 126 CAP Sambucus mexicana blue elderberry 1/1 1 127 CHE Chenopodium murale *nettle-leaved goosefoot 10/3 2/1 128 CRA Crassula connata pygmy-weed 10/1 99/1 129 CRA Dudleya saxosa ssp. aloides desert dudleya 10/5 5/4 2/1 2 130 CUC Cucurbita palmata coyote melon 1/1 1/1 1 131 CUC Marah macrocarpus var. macrocarpus wild-cucumber 2/2 4 132 CUS Cuscuta californica var. papillosa papillate dodder 5/1 133 ERI Arctostaphylos glauca bigberry manzanita 6/1 2 134 EUP Bernardia myricifolia western bernardia 10/3 2/2 1/1 1 135 EUP Chamaesyce albomarginata rattlesnake weed 10/2 1 136 EUP Chamaesyce arizonica Arizona spurge 1/1 137 EUP Chamaesyce melanadenia red-gland spurge 99/9 50/9 50/2 5 138 EUP Chamaesyce micromera Sonoran spurge 1 139 EUP Chamaesyce polycarpa small-seeded spurge 99/7 99/9 50/9 1 2 140 EUP Chamaesyce setiloba Yuma spurge 1 141 EUP Ditaxis lanceolata narrowleaf ditaxis 50/9 50/9 20/9 1 142 EUP Ditaxis neomexicana New Mexico ditaxis 1/1 50/9 50/9 143 EUP Stillingia linearifolia linear-leaved stillingia 4/2 1/1 30/3 144 FAB Acacia greggii catclaw 99/9 30/5 99/9 5/1 145 FAB Astragalus didymocarpus var. dispermus dwarf white milk-vetch 2 146 FAB Astragalus palmeri Palmer's milk-vetch 2 147 FAB Dalea mollissima downy dalea 3/1 1/1 148 FAB Lotus argophyllus var. argophyllus southern California silver-lotus 1 149 FAB Lotus rigidus desert lotus 99/9 20/9 10/2 1 2 150 FAB Lotus salsuginosus var. brevivexillus short-bannered coastal lotus 30/9 30/9 50/9 20/9 1 151 FAB Lotus scoparius var. brevialatus short-winged deerweed 30/5 3/2 1 152 FAB Lotus strigosus strigose lotus 20/9 3 153 FAB Lupinus arizonicus Arizona lupine 40/9 154 FAB Lupinus bicolor dwarf lupine 4 155 FAB Lupinus concinnus bajada lupine 1/1 5/2 5/2 3 1 156 FAB Lupinus sparsiflorus Coulter's lupine 99/9 5/1 1 157 FAB Melilotus indicus *sourclover 50/9 158 FAB Prosopis glandulosa var. torreyana honey mesquite 30/4 159 FAB Psorothamnus schottii indigo bush 99/7 99/9 20/9 160 FAG Quercus cornelius-mulleri desert scrub oak 30/7 4 1 161 FAG Quercus palmeri Palmer's oak 1 162 FOU Fouquieria splendens ssp. splendens ocotillo 50/3 99/9 50/9 4 163 GAR Garrya flavescens ashy silk tassel 1 164 GER Erodium cicutarium *redstem filaree 99/9 99/9 99/9 99/9 165 GER Erodium texanum Texas filaree 5/1 166 GRO Ribes indecorum white-flowering currant 3/3 1 167 GRO Ribes quercetorum oak gooseberry 3 168 HYD Emmenanthe penduliflora var. penduliflora whispering bells 1/1 20/9 30/9 2 2 169 HYD Eriodictyon trichocalyx var. lanatum smoothleaf yerba santa 50/5 1 170 HYD Eucrypta chrysanthemifolia var. bipinnatifida eucrypta 5/2 1 171 HYD Nama demissum var. demissum purple mat 2/2 3/1 2 172 HYD Nemophila menziesii var. menziesii baby blue eyes 2 173 HYD Phacelia affinis limestone phacelia 2 174 HYD Phacelia brachyloba short-lobed phacelia 1 175 HYD Phacelia cicutaria var. hispida caterpillar phacelia 5/1 10/3 176 HYD Phacelia crenulata var. minutiflora little-flowered heliotrope phacelia 30/9 177 HYD Phacelia curvipes curve-stem phacelia 1 178 HYD Phacelia distans common phacelia 99/5 99/9 99/9 99/9 3 2 179 HYD Phacelia minor wild canterbury bells 10/9 1 180 HYD Phacelia parryi Parry's phacelia 1 181 HYD Phacelia pedicellata pedicellate phacelia 10/1 182 HYD Phacelia ramosissima var. latifolia branching phacelia 50/7 183 HYD Pholistoma membranaceum white fiesta flower 50/3 99/9 1 184 KRA Krameria erecta Pima rhatany 40/9 50/9 10/2 2 185 KRA Krameria grayi white rhatany 2/2 10/2 30/9 186 LAM Hyptis emoryi desert-lavender 50/7 99/9 20/9 2 187 LAM Salvia apiana white sage 6/3 2/2 1 188 LAM Salvia columbariae chia 20/2 1/1 99/9 2 189 LAM Salvia eremostachya desert sage 10/3 3 190 LAM Salvia vaseyi Vasey's sage 10/5 4/4 2/1 1 191 LAM Stachys ajugoides var. rigida rigid hedge-nettle 5/1 192 LOA Mentzelia affinis yellow blazing star 20/5 193 LOA Mentzelia albicaulis white-stemmed blazing star 2 194 LOA Mentzelia involucrata bracted blazing star 5/3 20/9 195 LOA Mentzelia veatchiana Veatch's blazing star 2 196 LYT Lythrum californicum California loosestrife 20/1 197 MAL Hibiscus denudatus rock hibiscus 30/5 2/2 10/5 1 198 MAL Horsfordia newberryi Newberry's velvet mallow 5/2 1 199 MAL Malacothamnus aboriginum Indian Valley bush mallow 50/9 2 200 MAL Sphaeralcea ambigua var. ambigua apricot mallow 3/3 3/3 50/9 201 NYC Allionia incarnata trailing four o'clock 5/1 202 NYC Boerhavia coccinea scarlet spiderling 10/1 203 NYC Boerhavia intermedia fivewing spiderling 99/9 99/9 99/9 204 NYC Mirabilis bigelovii var. retrorsa Bigelow's desert four-o'clock 30/9 30/9 40/7 5/5 1 205 NYC Mirabilis multiflora var. pubescens giant four o'clock 2 206 OLE Menodora scoparia broom twinberry 5/2 30/6 207 ONA Camissonia boothii ssp. condensata Booth's evening primrose 20/9 1 208 ONA Camissonia californica California suncup 5/1 99/9 99/9 99/9 1 1 209 ONA Camissonia cardiophylla ssp. cardiophylla heartleaf sun-cup 20/3 210 ONA Camissonia claviformis ssp. peirsonii brown-eyed primrose 50/9 211 ONA Camissonia confusa San Bernardino sun-cup 1 212 ONA Camissonia pallida ssp. pallida pale sun-cup 2 1 213 ONA Camissonia strigulosa strigose sun-cup 1 214 ONA Epilobium canum ssp. latifolium mountain California-fuchsia 50/2 1 215 ONA Gaura drummondii *Drummond's gaura 2 216 ONA Oenothera californica ssp. avita California evening-primrose 1 217 ONA Oenothera californica ssp. californica California evening-primrose 1 218 ONA Oenothera elata ssp. hirsutissima Hooker's evening-primrose 2/1 219 PAP Argemone munita prickly poppy 5/2 220 PAP Dicentra chrysantha golden ear drops 1 221 PAP Eschscholzia californica California poppy 1/1 1 222 PAP Eschscholzia minutiflora ssp. minutiflora small-flowered poppy 10/2 99/9 40/9 1 3 223 PAP Eschscholzia parishii Parish's poppy 2/2 99/9 2 1 224 PAP Platystemon californicus cream cups 5 225 PLA Plantago major *common plantain 5/1 226 PLA Plantago ovata desert plantain 99/9 99/9 99/9 227 PLA Platanus racemosa western sycamore 20/5 228 POL Eriastrum eremicum ssp. eremicum desert woolly-star 99/9 99/9 10/1 30/9 2 229 POL Gilia capitata ssp. abrotanifolia globe gilia 30/6 1 230 POL Gilia stellata star gilia 1/1 50/9 1 1 231 POL Langloisia setosissima ssp. setosissima bristly langloisia 99/9 232 POL Linanthus bigelovii Bigelow's linanthus 1 233 POL Linanthus dianthiflorus ground pink 1 234 POL Linanthus lemmonii Lemmon's linanthus 4 235 POL Loeseliastrum matthewsii desert calico 2/1 20/1 236 POL Chorizanthe brevicornu var. brevicornu brittle spineflower 5/1 10/9 40/9 237 POL Eriogonum elongatum var. elongatum long-stemmed buckwheat 1/1 1 238 POL Eriogonum fasciculatum var. polifolium California buckwheat 99/9 50/9 10/3 1 239 POL Eriogonum gracile var. gracile slender buckwheat 1 240 POL Eriogonum gracile var. incultum slender buckwheat 30/5 3/1 241 POL Eriogonum inflatum desert trumpet 1/1 50/9 30/9 1 242 POL Eriogonum maculatum spotted buckwheat 2 243 POL Eriogonum molestum pineland buckwheat 1 244 POL Eriogonum thomasii Thomas' buckwheat 50/9 1 245 POL Eriogonum wrightii var. nodosum Wright's buckwheat 10/3 30/4 5/3 246 POL Oxytheca trilobata three-lobed oxytheca 1 247 POL Pterostegia drymarioides threadstem 2/1 3/1 1/1 1 248 POL Rumex conglomeratus *whorled dock 1/1 249 POR Claytonia parviflora ssp. parviflora narrow-leaved miner's lettuce 3/1 1 250 RAN Clematis lasiantha virgin's bower 1/1 251 RAN Delphinium parishii ssp. subglobosum intermediate larkspur 10/3 2/2 252 RHA Ceanothus greggii var. perplexans cupped-leaf ceanothus 3 253 RHA Rhamnus ilicifolia hollyleaf redberry 1 254 RHA Ziziphus parryi var. parryi lotebush 50/9 10/2 2/2 1 255 ROS Adenostoma fasciculatum chamise 1 256 ROS Cercocarpus betuloides var. betuloides birch-leaf mountain-mahogany 15/4 2 257 ROS Prunus fremontii desert apricot 50/9 20/2 50/9 4 258 RUB Galium andrewsii ssp. andrewsii phlox-leaved bedstraw 1 259 RUB Galium angustifolium ssp. borregoense Borrego bedstraw 40/5 2/2 5 260 RUB Galium stellatum var. eremicum star-flowered bedstraw 10/4 261 SAL Populus fremontii ssp. fremontii Fremont cottonwood 2/2 262 SAL Salix exigua narrowleaf willow 10/3 263 SAL Salix laevigata red willow 20/5 264 SAU Anemopsis californica yerba mansa 1 265 SCR Antirrhinum filipes desert twining snapdragon 4/4 266 SCR Castilleja exserta ssp. exserta purple owl's-clover 1 267 SCR Castilleja foliolosa woolly Indian paintbrush 1/1 1 268 SCR Collinsia concolor southern Chinese houses 20/6 2 269 SCR Keckiella antirrhinoides var. microphylla little-leaved chaparral beard-tongue 5/3 270 SCR Mimulus aurantiacus bush monkeyflower 2 271 SCR Mimulus bigelovii var. bigelovii Bigelow's monkeyflower 99/9 5/2 1 272 SCR Mimulus cardinalis scarlet monkeyflower 5/1 273 SCR Mohavea confertiflora ghost flower 10/2 274 SCR Penstemon centranthifolius scarlet bugler 2 275 SCR Scrophularia californica ssp. floribunda California bee plant 1 276 SCR Veronica anagallis-aquatica *water speedwell 5/1 277 SIM Simmondsia chinensis jojoba 10/7 50/9 50/9 5/2 1 278 SOL Datura discolor desert thornapple 5/5 279 SOL Datura wrightii sacred datura 1/1 280 SOL Lycium andersonii Anderson's desert-thorn 4/3 30/3 281 SOL Nicotiana obtusifolia desert tobacco 20/5 1/1 282 SOL Physalis crassifolia thick-leaved ground cherry 20/9 5/5 1/1 283 SOL Solanum douglasii white nightshade 1/1 284 SOL Solanum parishii Parish's purple nightshade 2/1 1 285 STE Ayenia compacta ayenia 5/3 50/5 2/1 286 TAM Tamarix sp. *tamarisk 2/1 287 URT Parietaria hespera var. hespera pellitory 99/9 30/9 1 288 VIS Phoradendron californicum desert mistletoe 30/9 10/3 1 289 VIT Vitis girdiana wild grape 10/1 290 ZYG Fagonia laevis California fagonia 99/9 20/5 50/9 1 1 291 ZYG Larrea tridentata creosote bush 50/7 99/9 99/9 292 ARE Washingtonia filifera California fan palm 99/5 293 JUN Juncus mexicanus Mexican rush 1 294 JUN Juncus oxymeris pointed rush 1 295 JUN Juncus xiphioides iris-leaved rush 20/2 296 LIL Agave deserti desert agave 50/9 99/9 99/9 10/2 297 LIL Allium fimbriatum var. fimbriatum fringed onion 2 298 LIL Calochortus concolor golden-bowl mariposa 1 299 LIL Dichelostemma capitatum ssp. capitatum blue dicks 1/1 1/1 1 300 LIL Muilla maritima muilla 2/1 15/3 301 LIL Nolina parryi Parry's nolina 2/1 5 302 LIL Yucca schidigera Mohave yucca 30/9 5 303 LIL Yucca whipplei chaparral yucca 1/1 3 304 ORC Epipactis gigantea stream orchid 3 305 POA Achnatherum coronatum giant needlegrass 1 306 POA Achnatherum parishii Parish's needlegrass 1/1 307 POA Achnatherum speciosum desert needlegrass 50/9 1/1 4 308 POA Aristida adscensionis six-weeks three-awn 20/2 5/1 309 POA Aristida purpurea var. nealleyi Nealley three-awn 3/3 1/1 310 POA Aristida purpurea var. parishii Parish three-awn 1 311 POA Avena barbata *slender wild oats 50/5 312 POA Bouteloua aristidoides var. aristidoides needle grama 20/5 313 POA Bromus diandrus *ripgut brome 2/1 40/2 314 POA Bromus madritensis ssp. rubens *red brome 99/9 30/9 99/9 30/9 315 POA Bromus tectorum *downy brome 5/1 316 POA Cynodon dactylon *Bermuda grass 1/1 317 POA Melica frutescens tall melica 5/1 20/4 2 1 318 POA Muhlenbergia microsperma littleseed muhly 20/1 319 POA Muhlenbergia rigens deergrass 5/1 320 POA Pennisetum setaceum *fountain grass 20/2 3 321 POA Pleuraphis rigida big galleta 5/3 10/1 3/1 322 POA Poa secunda one-sided blue grass 1 323 POA Poa secunda ssp. juncifolia rush blue grass 30/2 5/1 324 POA Polypogon monspeliensis *rabbits-foot grass 30/3 325 POA Schismus barbatus *Mediterranean schismus 10/1 10/1 99/9 99/9 2 326 POA Vulpia microstachys var. pauciflora Pacific fescue 1 327 POA Vulpia octoflora var. hirtella hairy six-weeks fescue 20/5 1 328 TYP Typha latifolia broadleaf cattail 1
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Last update: 22 January 2010