Flora of North America species comparison

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Astragalus subcinereus var. sileranus

Astragalus subcinereus var. subcinereus
Photo is of parent taxon

Siler's milkvetch
Photo is of parent taxon
Stems

prostrate, 14–60 cm, often conspicuously flexuous.

ascending or prostrate, 14–50 cm.
Flowers

5–9 mm.

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).

ovoid or ovoid-ellipsoid, bladdery-inflated, length less than 2 times width, relatively broad, usually 6–13 mm wide.

Astragalus subcinereus var. sileranus

Astragalus subcinereus var. subcinereus
Phenology Flowering May–Aug. Flowering May–Sep.
Habitat Ponderosa pine, aspen, oak, pinyon-juniper, and mixed mountain brush communi­ties. Pon­derosa pine, white fir, pinyon-juniper, aspen, and sage­brush communities.
Elevation 1700–2800 m. (5600–9200 ft.) 1600–2600 m. (5200–8500 ft.)
Distribution
from FNA
NV; UT
from FNA
AZ; NV; 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 subcinereus occurs in Coconino and Mohave counties in Arizona, Lincoln County in Nevada, and Garfield, Kane, and Washington counties in Utah.

Much of the material in southern Utah differs from plants in Mohave County, Arizona, in having broader leaflets, longer stems, and more firmly-walled fruits, and has been called Astragalus sileranus var. cariacus. The features are weak and overlapping at best.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Scytocarpi > Astragalus subcinereus Fabaceae > subfam. Faboideae > Astragalus > sect. Scytocarpi > Astragalus subcinereus
Sibling taxa
A. subcinereus var. basalticus, A. subcinereus var. subcinereus
A. subcinereus var. basalticus, A. subcinereus var. sileranus
Synonyms A. sileranus, Phaca sileriana A. sileranus var. cariacus
Name authority (M. E. Jones) S. L. Welsh: Great Basin Naturalist 58: 49. (1998) unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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