Plant Species of the Borrego Desert: Endemic Species
There are 10 species which live only in the ABDSP area or nearby, plus an 11th species (Lepidium flavum var. felipense) if it is accepted as a distinct species. Such species are called endemics or near endemics, and are always fascinating to people since humans love rare things. If you want to see these endemic species, you can see them only here or closeby.
Table 1 lists these taxa in alphabetical order of their scientific name as given in the Jepson Manual second edition (JM2). The geographic range given is first the one in the JM2, expanded with notes.
See Information about the links from the Scientific Name and Common Name.
Table 1. Species Endemic or Near-Endemic to ABDSP
# Fam Scientific Name Common Name Geographic Range 1 Fabac Acmispon haydonii pygmy lotus se PR, sw DSon, Baja CA. 2 Aster Chaenactis carphoclinia var. peirsonii Peirson's pincushion e PR (e SnRsMtns), adjacent w DSon. 3 Cacta Cylindropuntia fosbergii pink teddy-bear cholla DSon (e San Diego County) 4 Aster Eriophyllum wallacei var. rubellum Wallace's woolly daisy not in JM2, but it should have been. It is a well-defined taxon with a very distinct geographic range. 5 Rubia Galium angustifolium ssp. borregoense Borrego bedstraw DSon (Borrego Palm Canyon, Hellhole Canyon, Pinyon Mtn Valley, all in San Diego County 6 Brass Lepidium flavum var. felipense Borrego Valley pepper-grass merged with the widespread and abundant var. flavum in JM2. If var. felipense is a separate taxon, it is only found at the playa in Little Blair Valley 7 Fabac Lupinus excubitus var. medius Mountain Springs bush lupine sw DSon 8 Campa Nemacladus twisselmannii Twisselmann's nemacladus An endemic if our plants are a new species distinct from N. twisselmannii; otherwise a near endemic 9 Borag Phacelia umbrosa Colorado Desert phacelia PR; Baja California; species may not be distinct from P. distans 10 Apiac Spermolepis infernensis Hellhole Canyon spermolepis not in JM2. In 2012, Neson defined this species as being only in Hellhole Canyon 11 Aster Xylorhiza orcuttii Orcutt's woody-aster s DSon
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Updated 31 October 2014.