Flora of North America species comparison

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Astragalus toanus var. scidulus

Astragalus toanus var. toanus
Photo is of parent taxon

Arizona strip milkvetch, toano milkvetch
Photo is of parent taxon

toano milkvetch
Leaflets

(0 or 1 or)11 or 13.

(0 or 1–)3–9.
Flowers

14–16.5 mm;

corolla greenish yellow or whitish.

(13–)15–20 mm;

corolla pink-purple.
Legumes

8–9 mm wide.

3.5–5.5(–7) mm wide.

A 2n = 22.

2n

= 22.

Astragalus toanus var. scidulus

Astragalus toanus var. toanus
Phenology Flowering Apr–May. Flowering May–Jul.
Habitat Mixed desert shrub and grass commu­nities. Selenif­erous, saline clay and silty soils, desert shrub communities, often with shadscale, bursage, greasewood, and matchweed.
Elevation 1600 m. (5200 ft.) 1400–1900 m. (4600–6200 ft.)
Distribution
from FNA
AZ
[BONAP county map]
from FNA
ID; NV; OR; UT
[BONAP county map]
Discussion

Variety scidulus is distantly isolated from var. toanus in the Arizona Strip, Mohave County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Variety toanus resembles the distantly disjunct Astragalus saurinus of the Uinta Basin and A. rafaelensis of the San Rafael Swell, Utah.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Pectinati > Astragalus toanus Fabaceae > subfam. Faboideae > Astragalus > sect. Pectinati > Astragalus toanus
Sibling taxa
A. toanus var. toanus
A. toanus var. scidulus
Name authority S. L. Welsh & N. D. Atwood: Rhodora 95: 403, fig. 11. (1993) 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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