Flora of North America species comparison

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Astragalus molybdenus var. lackschewitzii

Astragalus sect. Minerales
Photo is of parent taxon

Lackschewitz's milkvetch
Habit Herbs perennial, wide-spreading, mat-forming, shortly caulescent; caudex subterranean, extensively branched.
Stems

several.
Leaves

odd-pinnate, petiolate;

leaflets 9–25.
Leaflets

(13 or)15–23 distally, blade surfaces sparsely pubes-cent.

Racemes

(2 or)3–5-flowered.

short or subumbellate, loosely flowered, flowers ascending.
Corollas

pink-purple, lilac, or whitish, banner recurved through 45–50°, keel apex bluntly triangular.
Calyx

tubes campanulate.
Legumes

3-sided compressed, 8.5–11.2 mm, gradually attenuated to a persistent style.

persistent, discontinuous with receptacle, sessile or subsessile, ascending (humistrate), obliquely ovoid, lanceoloid-ovoid, or ovoid-ellipsoid, 3-sided compressed, flattened or depressed dorsally, unilocular.
Seeds

6–9.
Hairs

basifixed.
Stipules

connate.

Astragalus molybdenus var. lackschewitzii

Astragalus sect. Minerales
Phenology Flowering Jul–Aug.
Habitat Alpine tundra.
Elevation 2200–2500 m. (7200–8200 ft.)
Distribution
from FNA
MT
w United States
Discussion

Variety lackschewitzii is based on rather tenuous characteristics of leaflet pubescence and fruit compression, made significant by the geographic isolation of the populations from the other two varieties.

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

Species 1.

M. Lavin and H. Marriott (1997) placed sect. Minerales as a synonym of sect. Polares, a proposal with considerable merit. Nevertheless, sect. Minerales differs subtly, but significantly, in its fruits being sessile (or subsessile) and not at all inflated.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Minerales > Astragalus molybdenus Fabaceae > subfam. Faboideae > Astragalus
Sibling taxa
A. molybdenus var. molybdenus, A. molybdenus var. shultziorum
Subordinate taxa
Synonyms A. lackschewitzii
Name authority (Lavin & Marriott) S. L. Welsh: N. Amer. Sp. Astragalus, 51. (2007) Barneby: Mem. New York Bot. Gard. 13: 114. (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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