Flora of North America species comparison

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Astragalus laxmannii var. tananaicus
Photo is of parent taxon

Laxmann's milk-vetch, standing milkvetch, tanana milkvetch
Leaves

(2–)4–10 cm;

leaflets (7–)11–17, blades (4–)7–25 mm.
Racemes

10–20-flowered;

axis 1–3.5 cm in fruit.
Peduncles

4–12 cm.
Flowers

11.5–16.2 × 4.5–6.6 mm;

calyx 5.6–6.8 mm, tube 4.6–5.7 × 3–3.8 mm, lobes subulate, 0.4–1(–2.1) mm;

corolla white.
Legumes

narrowly oblong or oblong-ellipsoid, 6–12 × 2.5–4 mm, densely strigulose, hairs black and relatively short, with ascending, white, straight, longer ones;

stipe 0.7–1.8 mm.
Seeds

(9–)12–16(–18).

Astragalus laxmannii var. tananaicus
Phenology Flowering Jun–early Aug.
Habitat Shaley river bluffs, shingle bars, pebbly banks of streams, on disturbed gravelly or sandy soils near highways, airfields, or beaches, dry grassy meadows, hillsides.
Elevation 100–800 m. (300–2600 ft.)
Distribution
from FNA
AK; YT
[BONAP county map]
Discussion

Variety tananaicus is known mostly from the Yukon River drainage in southern Yukon and east-central Alaska.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Onobrychoidei > Astragalus laxmannii
Sibling taxa
A. laxmannii var. robustior
Synonyms A. tananaicus, A. adsurgens subsp. viciifolius
Name authority (Hultén) Barneby & S. L. Welsh: Great Basin Naturalist 56: 85. (1996)
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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