Flora of North America species comparison

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Astragalus sect. Polares
Habit Herbs perennial, caulescent; caudex superficial or subterranean.
Stems

few or several to many.
Leaves

odd-pinnate, petiolate or subsessile;

leaflets 7–17(or 19).
Racemes

sometimes subumbellate, compactly or loosely flowered, flowers ascending or spreading.
Corollas

usually pink-purple, rarely white, banner recurved through 40–45°, keel apex obtuse.
Calyx

tubes campanulate.
Legumes

deciduous, sessile on a slightly elevated receptacle, spreading or ascending and humistrate, obliquely ovoid, moderately to greatly inflated, ± laterally compressed or 3-sided, unilocular.
Seeds

2–17.
Hairs

basifixed.
Stipules

connate or distinct at distal nodes.

Astragalus sect. Polares
Distribution
North America; Asia (Siberia)
Discussion

Species 2 (2 in the flora).

Section Polares consists of mesophytic species distributed from Alaska to Newfoundland, southward to Utah, New Mexico, and Nebraska. M. Lavin and H. Marriott (1997) realigned Astragalus molybdenus of the monospecific sect. Minerales, placing it within sect. Polares, a proposal with considerable merit, but not followed here (see discussions under 5. A. molybdenus).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus
Subordinate taxa
Synonyms Phaca section polares
Name authority (Rydberg) Barneby: Mem. New York Bot. Gard. 13: 370. (1964)
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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