familyFabaceae
subfamilyFabaceae subfam. Faboideae
genusAstragalus
sectionAstragalus sect. Scytocarpi
speciesAstragalus subcinereus
Astragalus subcinereus var. sileranus
Great Basin Naturalist 58: 49. 1998.
Common names: Siler’s milkvetch
Endemic
Basionym: Astragalus sileranus M. E. Jones Zoë 2: 242. 1891
Synonyms: Phaca sileriana (M. E. Jones) Rydberg
Treatment appears in FNA Volume 11.
Stems prostrate, 14–60 cm, often conspicuously flexuous. Flowers 5–9 mm. Legumes ellipsoid, turgid, not bladdery-inflated, length usually more than 2 times width, 5–8 mm wide (if shorter, less than 7 mm wide and texture leathery).
Phenology: Flowering May–Aug.
Habitat: Ponderosa pine, aspen, oak, pinyon-juniper, and mixed mountain brush communities.
Elevation: 1700–2800 m.
Discussion
Variety sileranus occurs in Lincoln County in Nevada, and Garfield, Iron, Kane, and eastern Washington counties in Utah.
The main overlap in distribution between vars. subcinereus and sileranus occurs in Lincoln County, Nevada, but still, this variety is most closely allied to the disjunct var. basalticus of central Utah.
Selected References
None.
Lower Taxa
None.