Plant Species of San Gabriel Mountains: Endemic Species
There are 15 species which live only in the San Gabriel Mountains (SnGb). Such species are called 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.
In addition, there are nine species where most of their population lives at SnGb, but which have a small number of individuals in neighboring areas, or in just one other location. These species are called near endemics.
The total number of endemic or near-endemic species is thus 24.
Table 1 lists the strictly-endemic species, and Table 2 lists the near-endemic species, in alphabetical order of their scientific name as given in the Jepson Manual second edition (JM2), if they have one, or by their scientific name if they were defined after the publication of 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 Strictly Endemic to SnGb
# Fam Scientific Name Common Name Geographic Range 1 Fabac Astragalus lentiginosus var. antonius San Antonio milk-vetch SnGb 2 Oroba Castilleja gleasonii Mt. Gleason Indian paintbrush SnGb (Mt. Gleason) 3 Rosac Drymocallis cuneifolia var. ewanii Ewan's cinquefoil SnGb (Mt. Islip area) 4 Crass Dudleya cymosa ssp. crebrifolia San Gabriel River dudleya SnGb (Fish Canyon, L.A. county) 5 Crass Dudleya densiflora San Gabriel Mtns. dudleya SnGb (L.A. county) 6 Rubia Galium angustifolium ssp. gabrielense San Antonio Canyon bedstraw SnGb 7 Rubia Galium grande San Gabriel bedstraw SnGb 8 Saxif Heuchera abramsii Abrams's alumroot SnGb 9 Polem Linanthus concinnus San Gabriel linanthus SnGb 10 Fabac Lupinus peirsonii Peirson's lupine SnGb 11 Lamia Monardella australis ssp. cinerea gray monardella SnGb, 1800 to 3100 m = 5900 to 10,100 feet. The JM2 said that plants approaching ssp. cinerea occur in SnBr and SnJt, but the latest publication by the JM2 authors gives cinerea as a SnGb endemic. 12 Lamia Monardella australis ssp. gabrielensis San Gabriel Mountain monardella SnGb (north-central portion near Pacifico Mountain), 1600 to 2200 m = 5250 to 7200 feet) 13 Lamia Monardella australis ssp. jokerstii Jokerst's monardella e SnGb, (n SCo) 14 Lamia Monardella breweri ssp. glandulifera Brewer's glandular monardella s SnGb (Brown Flats vicinity) 15 Lamia Monardella saxicola rock monardella e SnGb
Table 2. Species Nearly Endemic to SnGb
# Fam Scientific Name Common Name Geographic Range 16 Erica Arctostaphylos glandulosa ssp. gabrielensis San Gabriel manzanita SnGb, s ScoRO (Sierra Madre Mtns) 17 Convo Calystegia peirsonii Peirson's morning-glory n SnGb, adj DMoj 18 Polyg Eriogonum microthecum var. johnstonii Johnston's buckwheat e SnGb, w SnBr, but a doubtful taxon 19 Polyg Eriogonum umbellatum var. minus alpine sulfur-flowered buckwheat SnGb, SnBr, but only two locations at SnBr. 20 Polem Gilia ochroleuca ssp. vivida volcanic gilia SnGb, Teh 21 Aster Hulsea vestita ssp. gabrielensis San Gabriel Mtns. sunflower SnGb, e WTR 22 Oroba Orobanche valida ssp. valida Rock Creek broomrape c WTR (Topatopa Mtns), SnGb. There is only a single voucher from the Topatopa Mtns. 23 Fagac Quercus durata var. gabrielensis San Gabriel Mtns. leather oak SnGb (s slope), se WTR 24 Aster Symphyotrichum greatae Greata's aster SnGb (S slope); vouchers now from Verdugo Mtns, Santa Monica Mtns, Topatopa Mtns, Liebre Mtns, but the overwhelming number of vouchers are from SnGb.
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Updated 13 September 2015.