Astragalus subcinereus var. sileranus |
Astragalus subcinereus var. basalticus |
|
---|---|---|
Siler's milkvetch |
Fremont junction milkvetch |
|
Stems | prostrate, 14–60 cm, often conspicuously flexuous. |
prostrate, 40–90 cm. |
Flowers | 5–9 mm. |
8.5–11 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). |
ellipsoid to cylindroid-ellipsoid, inflated, length usually more than 2 times width, 3.5–6(–7) mm wide. |
Astragalus subcinereus var. sileranus |
Astragalus subcinereus var. basalticus |
|
Phenology | Flowering May–Aug. | Flowering May–Jul. |
Habitat | Ponderosa pine, aspen, oak, pinyon-juniper, and mixed mountain brush communities. | Pinyon-juniper and ponderosa pine communities. |
Elevation | 1700–2800 m. (5600–9200 ft.) | 1400–2400 m. (4600–7900 ft.) |
Distribution |
NV; UT |
UT |
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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety basalticus is confined to western Emery and eastern Sevier counties. Variety basalticus and Astragalus flexuosus var. diehlii are sympatric in the range of var. basalticus. Fruits of var. basalticus are usually wider and the flowers longer. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. sileranus, Phaca sileriana | |
Name authority | (M. E. Jones) S. L. Welsh: Great Basin Naturalist 58: 49. (1998) | S. L. Welsh: Great Basin Naturalist 38: 302. (1978) |
Web links |