Flora of Borrego Badlands Area
Summary of Checklist and Species Not Found
This page has been updated on 22 January 2019, from more recent surveys, a new voucher search, and an iNaturalist search, but the text on most of the page has not yet been updated.
This checklist is a start at a flora of the Borrego Badlands Area, from vouchers and field surveys.
The floristic area denoted as the Borrego Badlands is delineated by the red rectangle in the following map:
The western area includes all of what is marked as the Borrego Badlands on the topographic map, plus additional non-badland area. This floristic area is extended to the east to the Imperial County Line since that eastern area is similar in many respects to the Badlands. The northern boundary is arbitrarily set along Highway S22 for convenience and clarity. The southern boundary is set to exclude the Borrego Sink Wash, San Felipe Creek, and the Ocotillo Wells Off-Road Vehicle Area.
Note that this area includes a majority of non-badlands area.
The name badlands refers to a intricately-sculptured landscape in easily-eroded rock, characterized by steep slopes, minimal vegetation, lack of a substantial regolith, and high drainage density. If this flora were confined to just the actual badland area, it would be much shorter, since only a small number of species can tolerate the lack of normal soil on the surface, and the extreme alkalinity of the exposed sedimentary rock. Most of the actual badlands have no vegetation at all on them.
Vouchers were searched and examined on at least three different dates, so the following is a bit more complicated than it would be from a single voucher search.
The vouchers come from a search on 16 December 2007 of the Consortium of California Herbaria, and a search of the San Diego Plant Atlas and Herbarium records, and a later search for vouchers with coordinates on 30 November 2013, for 33.24 to 33.30° N. latitude and -116.27 to -116.19° E. longitude. Vouchers outside the target area were tossed.
More information on the on 16 December 2007 voucher search:
The Consortium records were searched for San Diego County specimens that contained the words badland or Font in the locality. Redundant vouchers were removed, and 73 vouchers from the Carrizo Badlands were eliminated, leaving 105 vouchers of 52 taxa. The dominant collectors in the Consortium records were Joe Barth, 26 vouchers; Jon P. Rebman, J. Gibson, A. Winner, & misc. botany vols., 47 vouchers (of 15 unique collection numbers); and Duffie Clemons, Erik Jonson, Mike Curto, 13 vouchers.
The San Diego records were retrieved for grid cells F26-F29 and G26-G29. One record of Clematis lasiantha was rejected, after an examination of the locality field revealed that the coordinates for this record were erroneous. This resulted in 150 vouchers of 80 taxa. Note that some of the San Diego vouchers also appear in the Consortium records. Only the Plant Atlas records are identified with collector. The dominant collector by far in the San Diego records was jb2 with 51 vouchers; the next largest collector had 7 vouchers.
The determinations for all San Diego Plant Atlas vouchers were all marked as verified by Jon Rebman except for the single voucher of Pectis papposa var. papposa which most likely had simply not yet been processed yet. There are many vouchers of this taxon nearby.
The size of the area delineated in red in the map above is roughly 51 square miles. However, the San Diego Plant Atlas voucher search covered eight Plant Atlas Grid Cells, a total of 72 square miles. On 21 November 2014, I examined the localities in the Consortium of all the species from this voucher set that we have not observed in this area, and tossed species without vouchers actually in the target area.
On 16 December 2007, there were 95 total unique taxa found by combining the two searches. Two of these taxa, Isocoma acradenia var. acradenia and Helianthus niveus ssp. tephrodes, did not appear in Floristic Area #16 in Duffie Clemons' 1985 Checklist of Vascular Plants of the Anza-Borrego Desert, but are present in the 2006 San Diego County Checklist.
Since 16 December 2007, I have augmented the vouchers as I have come across additional records in the course of other work. In particular, in late November 2008 I added a few records from searches for species that I had observed in the Santa Rosa Mountains but which had no vouchers recorded in my database.
The total number of vouchered taxa was 98 on 7 December 2008 from the first voucher search. Only 60 taxa were vouchered from the georeferenced vouchers retrieved on 30 November 2013. After tossing those species without vouchers actually in the target area, on 21 November 2014 the total number of taxa with vouchers is 97.
I have rejected one taxon, Mirabilis laevis var. villosa, that has two vouchers, since those are almost surely Mirabilis laevis var. retrorsa. It is difficult to properly determine some specimens of those two species that do not have the lower stems in the voucher sample, since those two varieties can look very similar in their inflorescence. All plants we've checked in this area have the retrose lower stem hairs of var. retrorsa.
Fig. 2 shows the locations where we have recorded GPS points for individual species in this area.
Fig. 2. Locations where we have recorded GPS points for individual species in the Borrego Badlands area as of 15 December 2014. GPS Points from later surveys are not yet included in these maps. Left: map of individual GPS points. Note that some locations have as many as 40 species recorded at the same point. Right: cluster version showing how many points are in each area.
Click on the maps for larger versions.
Field surveys were done of the following areas:
- Ella Wash to Vista del Malpais along Ella and Short Wash, returning via Palo Verde and Smoke Tree Wash, on 4 December 2008 (by Tom Chester, finding 46 species) and on 11 March 2009 (by Tom Chester, Mike Crouse and Dave Stith, finding 81 species). A total of 6.0 unique miles were surveyed, with a total of 87 species from the union of the two surveys.
- the Arroyo Salado / Seventeen Palms / Five Palms Spring area on 19 December 2008 (by Tom Chester and Mike Crouse) and 23 March 2009 (by Tom Chester and Mike Crouse). A total of 4.4 unique miles were surveyed, with a total of 78 species from the union of the two surveys..
- The portions of Inspiration Wash and Fonts Point Wash near Highway S22 on 28 December 2005 (by Tom Chester) and 11 December 2007 (by Tom Chester). A total of 1.5 unique miles were surveyed
- A loop containing Fonts Point on 15 December 2007 (by Tom Chester, Wayne Armstrong). A total of 2.0 unique miles were surveyed, finding just 23 species.
- A loop from the Borrego Dump site, through the Borrego Dunes into the Borrego Badlands Area on 20 February 2009 (by Tom Chester, Michael Charters and Dave Stith). This survey was partially in the Borrego Valley area, and partially in the Borrego Badlands area. It has not yet been processed for the flora on this page.
- A survey in the Beckman Wash area on 10 January 2010 by Tom Chester, Anne Kelly, RT Hawke, Aaron Schusteff, Bill Sullivan and Pam Pallette. A total of 0.7 unique miles were surveyed, finding 29 species.
- Fonts Point on 15 November 2014 (by Keir Morse), adding six species to the Fonts Point flora.
- A 5.5 mile loop from the beginning of the Thimble Trail at S22, to roughly south 0.7 miles, then west 2.3 miles toward the hill called Paint on the topo map near Fonts Point Wash, then return on the north side of those Badlands Hills. This survey was done by Tom Chester, Keir Morse, Adrienne Ballwey, and Whitney Meier on 10 December 2014, finding 41 species.
- Two separate short surveys done on 15 December 2014 by Tom Chester, Keir Morse and Adrienne Ballwey in the area of the southern Thimble Trail. One survey was of 1.8 miles in a tributary to Short Wash just north of the southern end of the Thimble Trail, finding just 20 species. Another survey was of just 0.2 mile southwest of the south end of the Thimble Trail, finding just 14 species.
- A survey of Inspiration Wash to Inspiration Point on 9 January 2016 by Tom Chester, Keir Morse, Fred Melgert, Carla Hoegen, and Don Rideout. One new species was added to the Borrego Badlands Flora, a single plant of Orobanche cooperi.
- A survey of two of the upper tributaries of Fonts Point Wash to the Rim on 13 January 2016 by Tom Chester, Mike Crouse, Kate Harper, and Keir Morse.
Field Work near Fonts Point Wash
I recorded all species seen in the parts of Inspiration Wash and Fonts Point Wash near Highway S22 during targeted searches for Pilostyles thurberi and Psorothamnus emoryi on 28 December 2005, augmented by one species seen on 11 December 2007. A total of just 23 species were found in those searches.
Wayne Armstrong and I recorded all species seen on 15 December 2007 in a 2 mile loop containing Fonts Point; just 24 species were found in that search.
A total of 35 taxa were found in those December searches; 11 of those 35 taxa, 31%, are not among the 16 December 2007 vouchered species.
On 15 November 2014, Keir Morse added five species to the Fonts Point flora, and one species to the Inspiration Wash and Fonts Point Wash near Highway S22 flora.
Field Work from Ella Wash, Short Wash, Vista del Malpais, Palo Verde Wash and Smoke Tree Wash
On 4 December 2008, I recorded all species seen on an 8 mile loop trip from S22 at Ella Wash to Vista del Malpais along Ella and Short Wash, returning via Palo Verde and Smoke Tree Wash. A total of 44 taxa were found that could be fairly confidently identified, and are given in the checklist below. Three other species were seen: an unknown dead annual like Chaenactis; a dead Cryptantha species probably distinct from the C. barbigera in the checklist; and a dead annual grass that may have been Schismus barbatus.
Dave Stith, Mike Crouse and I did this loop again at prime time on 11 March 2009.
Field Work from Arroyo Salado / Seventeen Palms / Five Palms Spring area
Mike Crouse and I surveyed this area on 19 December 2008 and again at prime time on 23 March 2009.
Field Work from Beckman Wash area
On 10 January 2010, Tom Chester, Anne Kelly, RT Hawke, Aaron Schusteff, and Pam Pallette surveyed a 0.7 mile loop, finding just 29 species. Annual germination was almost non-existent on this survey, except for Brassica tournefortii.
Summary of Checklist and Species Not Found
As of 20 November 2014, the total number of taxa presented below is 133, 125 of which are native (the list may have been updated after this summary was done). The list contains 134 entries, since the species Cryptantha barbigera is given as well as its two varieties found here, since the earlier surveys did not distinguish the two varieties.
It is likely that this area may have the lowest native biodiversity of any part of San Diego County for the following reasons:
- there is little total elevation relief;
- the landscape is similar throughout the Badlands;
- much of the landscape is eroding rapidly, with very steep slopes, preventing plants from getting established; and
- much of the soil is highly alkaline, which is not tolerated by most species.
An area of this size, roughly 51 square miles, in most of the rest of San Diego County would have roughly 500 native species, whereas this area has just 135 so far recorded. Oddly, the next most depauperate area in my database is San Clemente Island, with 233 native taxa in 57 square miles.
Although the number of species may be small, any area that contains Southern California's Most Unusual Wildflower, along with rarely-seen southern California species such as Orcutt's woody-aster, Xylorhiza orcuttii and Algodones Dunes sunflower, Helianthus niveus ssp. tephrodes, is still of major botanic interest.
It is interesting that the list contains no lycophytes (Selaginella), no ferns, and no gymnosperms. Table 1 gives the most common Borrego Desert species that are not known from the Borrego Badlands.
Table 1. The Most Common Borrego Desert Species That Are ***Not*** Known From The Borrego Badlands
# areas Common Name Scientific Name 54 Gander's cholla Cylindropuntia ganderi 43 teddy-bear cholla Cylindropuntia bigelovii 42 California trixis Trixis californica var. californica 42 common phacelia Phacelia distans 41 San Felipe dogweed Adenophyllum porophylloides 39 woolly lipfern Cheilanthes parryi 38 rock hibiscus Hibiscus denudatus 38 jojoba Simmondsia chinensis 37 Parish's viguiera Bahiopsis parishii 37 California buckwheat Eriogonum fasciculatum var. polifolium 35 Engelmann's hedgehog cactus Echinocereus engelmannii 34 thick-leaved ground cherry Physalis crassifolia 34 California fish-hook cactus Mammillaria dioica 31 chuparosa Justicia californica 31 arrow-leaf Pleurocoronis pluriseta 31 desert woolly-star Eriastrum eremicum ssp. eremicum 30 whispering bells Emmenanthe penduliflora var. penduliflora 30 star-flowered bedstraw Galium stellatum 30 California fagonia Fagonia laevis 29 Mojave ragwort Senecio mohavensis 29 western tansy-mustard Descurainia pinnata 29 bajada lupine Lupinus concinnus 29 Wright's buckwheat Eriogonum wrightii var. nodosum 28 Mormon tea Ephedra aspera 27 Vasey's sage Salvia vaseyi 27 apricot mallow Sphaeralcea ambigua var. ambigua 27 threadstem Pterostegia drymarioides 27 Anderson's boxthorn Lycium andersonii 26 California matchweed Gutierrezia californica 25 desert lotus Acmispon rigidus 25 purple three-awn Aristida purpurea 25 desert spike-moss Selaginella eremophila 24 curvenut combseed Pectocarya recurvata 24 California juniper Juniperus californica 23 Fremont pincushion Chaenactis fremontii 23 linear-leaved stillingia Stillingia linearifolia 23 desert apricot Prunus fremontii 22 star gilia Gilia stellata 22 London rocket Sisymbrium irio 22 California filago Logfia filaginoides 22 short-winged deerweed Acmispon glaber var. brevialatus 22 intermediate larkspur Delphinium parishii ssp. subglobosum 22 ayenia Ayenia compacta 21 Texas filaree Erodium texanum 21 boundary goldenbush Ericameria brachylepis 21 desert dudleya Dudleya saxosa ssp. aloides 20 desert brickellia Brickellia desertorum 20 beetle spurge Euphorbia eriantha 20 short-bannered coastal lotus Acmispon maritimus var. brevivexillus 20 white fiesta flower Pholistoma membranaceum
Checklist for Borrego Badlands
See also print versions of these floras for specific areas, which may have been updated later than the checklist below:
- Arroyo Salado: html (4 pages) or pdf Clickbook booklet (1 double-sided page)
- Ella Wash / Smoke Tree Wash / Palo Verde Wash: html (4 pages) or pdf Clickbook booklet (1 double-sided page)
- Notes on the Scientific Names Used At This Site and
- Information about the order in which the species are presented, and the links from the Scientific Name and Common Name.
An asterisk before the common name indicates a non-native species.
The column with header Famil is the first five letters of the Family Name.
The column with label BW links to the photo gallery page for each species at Fred Melgert and Carla Hoegen's BorregoWildflowers site.
The column #V gives the number of vouchers for this area, with a maximum value of 99.
The column iNat gives the number of iNaturalist observations for this area, with a maximum value of 99.
The columns with the header #Pls gives the minimum number of plants for each species observed in all areas, up to a maximum of 99. If we have not observed a species in our surveys, but it appears in Fred Melgert and Carla Hoegen's plant lists for here, the column contains FC.
Note that monsoonal species are not well-represented in the checklist for all areas due to a lack of summer / fall surveys in good monsoonal years, and winter annual / perennial species are not well-represented for some areas due to the lack of surveys in those areas in good winter rainfall years.
Version for printing, without lines and other text on this page: html (5 pages) or pdf Clickbook booklet (1 double-sided page). (See printing instructions for an explanation of these options)
# Famil Scientific Name
Link goes to the Jepson eflora
Link goes to Calphotos
BW #V iNat #Pls Eudicots 1 Amara Amaranthus fimbriatus fringed amaranth BW 99 2 Amara Tidestromia suffruticosa var. oblongifolia Arizona honeysweet BW 2 4 99 3 Apocy Asclepias albicans white-stemmed milkweed BW 3 4 Apocy Asclepias subulata rush milkweed BW 7 14 31 5 Apocy Funastrum hirtellum rambling milkweed BW 1 3 11 6 Apoda Pilostyles thurberi Thurber's pilostyles BW 7 46 7 Aster Ambrosia dumosa burroweed BW 7 42 99 8 Aster Ambrosia salsola var. salsola cheesebush BW 14 12 99 9 Aster Baileya pauciradiata Colorado Desert marigold BW 7 3 99 10 Aster Bebbia juncea var. aspera sweetbush BW 2 4 99 11 Aster Calycoseris parryi yellow tackstem BW 1 12 Aster Calycoseris wrightii white tackstem BW 2 6 66 13 Aster Chaenactis artemisiifolia meally white pincushion BW 1 14 Aster Chaenactis carphoclinia var. carphoclinia pebble pincushion BW 2 6 99 15 Aster Chaenactis carphoclinia var. peirsonii Peirson's pincushion BW 6 2 99 16 Aster Chaenactis stevioides desert pincushion BW 5 2 99 17 Aster Dicoria canescens desert dicoria BW 7 8 99 18 Aster Encelia farinosa brittlebush BW 6 8 99 19 Aster Encelia farinosa var. farinosa brittlebush BW 3 11 FC 20 Aster Encelia farinosa var. phenicodonta purple disk flower brittlebush BW 4 FC 21 Aster Encelia frutescens button encelia BW 8 14 99 22 Aster Geraea canescens hairy desert-sunflower BW 12 42 99 23 Aster Helianthus niveus ssp. tephrodes Algodones Dunes sunflower 2 24 Aster Helianthus petiolaris ssp. canescens gray desert sunflower BW 5 19 2 25 Aster Isocoma acradenia var. acradenia entire-leaved alkali goldenbush BW 2 FC 26 Aster Isocoma acradenia var. eremophila toothed-leaved alkali goldenbush BW 5 20 99 27 Aster Logfia depressa dwarf filago BW 30 28 Aster Malacothrix glabrata desert dandelion BW 5 5 75 29 Aster Monoptilon bellioides desert star BW 10 4 99 30 Aster Palafoxia arida var. arida Spanish needle BW 14 29 99 31 Aster Pectis papposa var. papposa chinch-weed BW 3 30 99 32 Aster Perityle emoryi Emory's rock-daisy BW 6 10 99 33 Aster Peucephyllum schottii pygmy-cedar BW 4 1 3 34 Aster Pleurocoronis pluriseta arrow-leaf BW 5 35 Aster Psathyrotes ramosissima turtleback BW 1 2 5 36 Aster Rafinesquia neomexicana desert chicory BW 8 19 99 37 Aster Sonchus asper ssp. asper *prickly sow thistle BW 1 38 Aster Sonchus oleraceus *sow thistle BW 1 4 39 Aster Stephanomeria exigua ssp. exigua slender wreathplant BW 1 40 Aster Stephanomeria pauciflora wire-lettuce BW 3 13 99 41 Aster Trichoptilium incisum yellow-head BW 1 21 42 Aster Xylorhiza orcuttii Orcutt's woody-aster BW 24 95 99 43 Bigno Chilopsis linearis ssp. arcuata desert-willow BW 3 40 99 44 Borag Cryptantha angustifolia narrow-leaved cryptantha BW 18 7 99 45 Borag Cryptantha barbigera var. barbigera bearded cryptantha BW 1 24 46 Borag Cryptantha barbigera var. fergusoniae Santa Rosa Mountain bearded cryptantha BW 9 99 47 Borag Cryptantha costata ribbed cryptantha BW 1 1 99 48 Borag Cryptantha ganderi Gander's cryptantha BW 2 49 Borag Cryptantha maritima Guadalupe cryptantha BW 7 3 99 50 Borag Cryptantha micrantha var. micrantha red-root cryptantha BW 48 51 Borag Eucrypta micrantha desert eucrypta BW 1 48 52 Borag Pectocarya heterocarpa chuckwalla pectocarya BW 5 1 99 53 Borag Pectocarya peninsularis Baja pectocarya BW 99 54 Borag Pectocarya platycarpa broad-fruited combseed BW 1 15 55 Borag Pectocarya recurvata curvenut combseed BW 1 1 21 56 Borag Phacelia crenulata var. ambigua heliotrope phacelia BW 12 33 99 57 Borag Phacelia crenulata var. minutiflora little-flowered heliotrope phacelia BW 4 6 58 Borag Phacelia ivesiana Ives' phacelia BW FC 59 Borag Tiquilia palmeri Palmer's coldenia BW 6 18 99 60 Borag Tiquilia plicata plicate coldenia BW 2 5 99 61 Brass Brassica tournefortii *Asian mustard BW 11 31 99 62 Brass Caulanthus lasiophyllus California mustard BW 42 63 Brass Dithyrea californica spectacle-pod BW 9 12 99 64 Brass Lepidium lasiocarpum ssp. lasiocarpum hairy-podded pepper-grass BW 8 13 99 65 Brass Sisymbrium irio *London rocket BW 1 99 66 Brass Streptanthella longirostris longbeak streptanthella BW 3 99 67 Cacta Cylindropuntia echinocarpa silver cholla BW 3 72 99 68 Cacta Cylindropuntia ramosissima pencil cholla BW 3 18 99 69 Cacta Echinocactus polycephalus var. polycephalus cottontop cactus BW 1 70 Cacta Ferocactus cylindraceus California barrel cactus BW 2 2 4 71 Cacta Mammillaria tetrancistra desert fish-hook cactus BW 1 4 72 Cacta Opuntia basilaris var. basilaris beavertail cactus BW 6 60 73 Campa Nemacladus tenuis var. tenuis desert threadplant BW 1 1 74 Caryo Achyronychia cooperi frost mat BW 9 6 99 75 Cheno Atriplex canescens var. laciniata Caleb saltbush BW 14 99 76 Cheno Atriplex elegans var. fasciculata wheelscale BW 1 99 77 Cheno Atriplex hymenelytra desert holly BW 14 50 99 78 Cheno Atriplex polycarpa cattle saltbush BW 3 99 79 Cheno Chenopodium murale *nettle-leaved goosefoot BW 1 1 80 Cheno Monolepis nuttalliana Nuttall's poverty weed BW FC 81 Cheno Salsola paulsenii *Paulsen's Russian thistle BW 1 1 61 82 Cheno Suaeda nigra bush seepweed BW 1 35 83 Cleom Cleomella obtusifolia Mojave cleomella BW 9 8 99 84 Eupho Chamaesyce abramsiana Abrams' prostrate spurge 99 85 Eupho Chamaesyce micromera Sonoran spurge BW 3 5 99 86 Eupho Chamaesyce ocellata ssp. arenicola sand spurge 1 1 87 Eupho Chamaesyce polycarpa small-seeded spurge BW 9 11 99 88 Eupho Chamaesyce setiloba starfish (Yuma) spurge BW 99 89 Eupho Croton californicus California croton BW 9 11 99 90 Eupho Ditaxis lanceolata narrowleaf ditaxis BW 1 43 91 Eupho Ditaxis neomexicana New Mexico ditaxis BW 9 92 Eupho Stillingia spinulosa annual stillingia BW 9 7 99 93 Fabac Acmispon maritimus var. brevivexillus short-bannered coastal lotus BW 5 94 Fabac Acmispon strigosus strigose lotus BW 4 2 99 95 Fabac Astragalus aridus annual desert milk-vetch 1 96 Fabac Astragalus crotalariae Salton milk-vetch BW 13 5 99 97 Fabac Astragalus didymocarpus var. dispermus dwarf white milk-vetch BW 1 7 98 Fabac Astragalus lentiginosus var. borreganus Borrego milk-vetch BW 14 1 99 99 Fabac Dalea mollis silky dalea BW 5 3 99 100 Fabac Dalea mollissima downy dalea BW 3 2 47 101 Fabac Lupinus arizonicus Arizona lupine BW 6 15 99 102 Fabac Lupinus shockleyi desert lupine BW 4 27 103 Fabac Parkinsonia florida blue palo verde BW 5 6 99 104 Fabac Prosopis glandulosa var. torreyana honey mesquite BW 1 1 43 105 Fabac Psorothamnus emoryi Emory's indigo-bush BW 12 14 99 106 Fabac Psorothamnus schottii indigo bush BW 5 34 99 107 Fabac Psorothamnus spinosus smoke tree BW 4 17 99 108 Fabac Senegalia greggii catclaw BW 2 99 109 Fouqu Fouquieria splendens ssp. splendens ocotillo BW 7 53 99 110 Geran Erodium cicutarium *redstem filaree BW 1 17 111 Geran Erodium texanum Texas filaree BW 1 6 99 112 Krame Krameria bicolor white rhatany BW 4 24 99 113 Krame Krameria erecta Pima rhatany BW 3 8 99 114 Lamia Hyptis emoryi desert-lavender BW 7 2 99 115 Lamia Salvia columbariae chia BW 1 5 116 Loasa Mentzelia affinis yellow blazing star BW 1 117 Loasa Mentzelia albicaulis white-stemmed blazing star BW 20 118 Loasa Mentzelia involucrata bracted blazing star BW 3 11 34 119 Loasa Petalonyx thurberi ssp. thurberi Thurber's sandpaper-plant BW 4 10 99 120 Malva Eremalche exilis white mallow BW 6 121 Malva Eremalche rotundifolia desert five-spot BW 6 99 122 Malva Hibiscus denudatus rock hibiscus BW 13 123 Malva Malva parviflora *cheeseweed BW 2 124 Mollu Mollugo cerviana *carpet-weed BW 10 125 Monti Calyptridium monandrum sand cress BW 13 126 Monti Cistanthe ambigua dead man's fingers BW 8 15 99 127 Nycta Abronia villosa var. villosa hairy sand-verbena BW 19 52 99 128 Nycta Allionia incarnata var. incarnata small-flowered trailing four o'clock BW 1 2 99 129 Nycta Boerhavia wrightii Wright's spiderling BW 1 3 130 Nycta Mirabilis laevis var. retrorsa Bigelow's desert four-o'clock BW 4 1 71 131 Onagr Chylismia cardiophylla ssp. cardiophylla heartleaf suncup BW 4 2 8 132 Onagr Chylismia claviformis ssp. peirsonii brown-eyed primrose BW 13 39 99 133 Onagr Eremothera boothii ssp. condensata Booth's evening primrose BW 5 15 99 134 Onagr Eulobus californicus California suncup BW 6 6 99 135 Onagr Oenothera deltoides ssp. deltoides dune primrose BW 3 26 99 136 Oroba Orobanche cooperi Cooper's broomrape BW 7 1 1 137 Papav Eschscholzia minutiflora ssp. minutiflora small-flowered poppy BW 7 3 99 138 Papav Eschscholzia parishii Parish's poppy BW 7 6 99 139 Plant Mohavea confertiflora ghost flower BW 11 140 Plant Plantago ovata desert plantain BW 9 10 99 141 Polem Aliciella latifolia ssp. latifolia broad-leaf gilia BW 7 15 99 142 Polem Gilia stellata star gilia BW 4 143 Polem Langloisia setosissima ssp. setosissima bristly langloisia BW 4 11 49 144 Polem Linanthus jonesii Jones' linanthus BW 75 145 Polem Loeseliastrum matthewsii desert calico BW 4 2 20 146 Polem Loeseliastrum schottii Schott's calico BW 99 147 Polyg Chorizanthe brevicornu var. brevicornu brittle spineflower BW 9 4 99 148 Polyg Chorizanthe corrugata wrinkled spineflower BW 5 2 99 149 Polyg Chorizanthe rigida devil's spineflower BW 5 37 99 150 Polyg Eriogonum deflexum var. deflexum flat-topped buckwheat BW 3 8 45 151 Polyg Eriogonum inflatum desert trumpet BW 1 1 99 152 Polyg Eriogonum thomasii Thomas' buckwheat BW 10 6 99 153 Polyg Eriogonum trichopes little desert trumpet BW 5 25 99 154 Resed Oligomeris linifolia lineleaf whitepuff BW 7 5 99 155 Solan Datura discolor desert thornapple BW 99 156 Solan Lycium brevipes var. brevipes desert boxthorn BW 8 68 157 Solan Nicotiana obtusifolia desert tobacco BW 3 10 158 Solan Physalis crassifolia thick-leaved ground cherry BW 1 1 68 159 Tamar Tamarix aphylla *athel BW 1 160 Tamar Tamarix ramosissima *saltcedar BW 1 FC 161 Visca Phoradendron californicum desert mistletoe BW 4 1 99 162 Zygop Fagonia laevis California fagonia BW 1 76 163 Zygop Fagonia pachyacantha sticky fagonia BW 12 164 Zygop Kallstroemia californica California caltrop BW 3 5 99 165 Zygop Larrea tridentata creosote bush BW 24 60 99 166 Zygop Tribulus terrestris *puncture-vine BW 2 Monocots 167 Agava Agave deserti var. deserti desert agave BW 1 168 Agava Hesperocallis undulata desert lily BW 11 116 99 169 Areca Washingtonia filifera California fan palm BW 1 23 170 Junca Juncus cooperi Cooper's rush BW 1 1 5 171 Poace Aristida adscensionis six-weeks three-awn BW 5 3 99 172 Poace Aristida californica California three-awn 3 173 Poace Bouteloua aristidoides var. aristidoides needle grama BW 2 4 174 Poace Bouteloua barbata var. barbata six-weeks grama BW 44 175 Poace Bromus madritensis ssp. rubens *red brome BW 2 176 Poace Cynodon dactylon *Bermuda grass BW 10 177 Poace Dasyochloa pulchella fluff grass BW 50 178 Poace Distichlis spicata saltgrass BW 2 3 99 179 Poace Hilaria rigida big galleta BW 14 28 99 180 Poace Hordeum murinum *foxtail barley BW 99 181 Poace Phragmites australis common reed BW 10 182 Poace Schismus barbatus *Mediterranean schismus BW 10 1 99 183 Poace Stipa hymenoides Indian ricegrass BW 4 4 FC
Copyright © 2007-2019 by Tom Chester (see list of people who participated in each of the surveys)
Permission is freely granted to reproduce any or all of this page as long as credit is given to me at this source:
Comments and feedback: Tom Chester
Last update: 10 February 2019