Flora of North America species comparison

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Astragalus toanus var. scidulus

Astragalus sect. Pectinati
Photo is of parent taxon

Arizona strip milkvetch, toano milkvetch
Habit Herbs perennial, selenophytes, clump-forming, caulescent; caudex subterranean or superficial.
Stems

several to many.
Leaves

odd-pinnate, sessile, subsessile, or petiolate;

leaflets (0 or 1–)5–15(–21), confluent with rachis or reduced to phyllodia.
Leaflets

(0 or 1 or)11 or 13.

Racemes

densely or loosely flowered, flowers ascending to declined or nodding.
Flowers

14–16.5 mm;

corolla greenish yellow or whitish.

Corollas

white, cream, ochroleucous, or pink-purple, banner recurved through 40–50°, keel apex obtuse.
Calyx

tubes cylindric.
Legumes

8–9 mm wide.

persistent, usually sessile, rarely stipitate, erect, deflexed, or pendulous, linear-ellipsoid, narrowly oblong, oblong-ellipsoid, or ellipsoid, compressed dorsiventrally or laterally, sutures protruding, unilocular.
Seeds

12–32.

A 2n = 22.

Hairs

basifixed.
Stipules

connate or distinct at distal nodes.

Astragalus toanus var. scidulus

Astragalus sect. Pectinati
Phenology Flowering Apr–May.
Habitat Mixed desert shrub and grass commu­nities.
Elevation 1600 m. (5200 ft.)
Distribution
from FNA
AZ
[BONAP county map]
w North America
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.)

Species 8 (8 in the flora).

Section Pectinati consists of two subsections: subsect. Osterhoutiani Barneby (Astragalus osterhoutii) and subsect. Pectinati (A. Gray) M. E. Jones (the other seven species).

(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
Sibling taxa
A. toanus var. toanus
Subordinate taxa
Name authority S. L. Welsh & N. D. Atwood: Rhodora 95: 403, fig. 11. (1993) A. Gray: Proc. Amer. Acad. Arts 6: 221. (1864)
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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