Flora of North America species comparison

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Astragalus praelongus var. praelongus
Photo is of parent taxon

stinking milkvetch
Flowers

15–24 mm;

calyx lobes deltate to lanceolate-subulate, 0.3–4.7 mm;

corolla ochroleucous, keel often faintly to definitely maculate.
Legumes

broadly oblong to ellipsoid, 20–38(–42) × (9–)10–15(–25) mm, glabrous or puberulent;

stipe obconic when present, 0–2.5 mm.
Stipules

distinct throughout.
2n

= 22, 24.

Astragalus praelongus var. praelongus
Phenology Flowering Apr–Jul.
Habitat Clay and silt of the Cretaceous Mancos and Tropic shales, Triassic Moenkopi, and Chinle formations, other seleniferous soils, in salt desert shrub and pinyon-juniper communities.
Elevation 700–2600 m. (2300–8500 ft.)
Distribution
from FNA
AZ; CO; NM; NV; UT
[BONAP county map]
Discussion

An extreme phase of var. praelongus is present in Zion Canyon and vicinity, growing tall and with fistulous stems.

Variety praelongus is highly toxic but is seldom grazed by healthy animals except during drought. W. E. Fox et al. (1998) reported that plants also contained swainsonine. The Hopi reportedly used the plant, under the name siskinga, in treatment of bladder problems.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Preussiani > Astragalus praelongus
Sibling taxa
A. praelongus var. avonensis, A. praelongus var. ellisiae, A. praelongus var. lonchopus
Name authority 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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