Flora of North America species comparison

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Astragalus mollissimus var. thompsoniae
Photo is of parent taxon

Thompson's woolly locoweed, woolly locoweed
Habit Plants acaulescent, 6–45 cm, from caudex.
Stems

mostly obscured by stipules.
Leaves

2–28 cm;

stipules 4–13 mm;

leaflets 15–35, blades obovate to suborbiculate or elliptic, 2–18 mm.
Racemes

7–25-flowered;

axis 1.5–18 cm in fruit.
Peduncles

2.5–24 cm.
Flowers

calyx 11–15.5 mm, tube 7.7–13 mm, lobes 2–4.2 mm;

corolla pink-purple;

banner 18–25 mm;

keel 15–18.5(–20.5) mm.
Legumes

curved, ovoid, turgid, 11–23 × 6–11 mm, densely villous-tomentose;

beak unilocular.
Seeds

28–38.

Astragalus mollissimus var. thompsoniae
Phenology Flowering Mar–Jun (Oct).
Habitat Salt desert shrub, mixed desert shrub, grasslands, and pinyon-juniper communities, usually on sandy substrates.
Elevation (700–)1100–2400 m. ((2300–)3600–7900 ft.)
Distribution
from FNA
AZ; CO; ID; NM; NV; UT
[BONAP county map]
Discussion

Variety thompsoniae is transitional with var. matthewsii in northwestern New Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Mollissimi > Astragalus mollissimus
Sibling taxa
A. mollissimus var. bigelovii, A. mollissimus var. coryi, A. mollissimus var. earlei, A. mollissimus var. marcidus, A. mollissimus var. matthewsii, A. mollissimus var. mogollonicus, A. mollissimus var. mollissimus
Synonyms A. thompsoniae
Name authority (S. Watson) Barneby: Mem. New York Bot. Gard. 13: 747. (1964) — (as thompsonae)
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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