Flora of North America species comparison

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Astragalus australis var. muriei
Photo is of parent taxon

Yukon milkvetch
Stems

ascending, 7–35 cm.
Leaves

(2–)3–6.5 cm; mostly petiolate, sometimes sessile distally;

leaflets (7 or)9–15, blades linear to narrowly elliptic, 6–15 mm, apex acute to obtuse, surfaces glabrous, strigulose-pilosulous, or villous.
Racemes

densely to somewhat loosely (6–)8–21-flowered;

axis 1.5–9.5 cm in fruit.
Peduncles

2.5–11 cm.
Flowers

8.5–9.5 mm;

calyx 4.2–5.5 mm, tube 2.4–2.7 mm, lobes 1.1–2.5 mm;

corolla whitish to purplish.
Legumes

obliquely ellipsoid to narrowly oblong, 11–24 × 4–7 mm, glabrous or sometimes strigose;

stipe 4–6 mm.

Astragalus australis var. muriei
Phenology Flowering Jun–Jul.
Habitat Mountain slopes, ridge crests, stream valleys, gravel bars, often with Artemisia.
Elevation 600–1200 m. (2000–3900 ft.)
Distribution
from FNA
YT
Discussion

Absence of consistent diagnostic criteria appears to prohibit the complete distinction of var. muriei from var. australis of the southern Europe type locality for the species. Petiolate specimens occur throughout the range of var. muriei, with distal leaves less often sessile. The type of this variety has strigulose fruits, which are unusual in plants from the arctic but not of diagnostic value within the group.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Hemiphragmium > Astragalus australis
Sibling taxa
A. australis var. glabriusculus, A. australis var. lepagei, A. australis var. olympicus
Synonyms A. aboriginorum var. muriei, A. linearis
Name authority (Hultén) S. L. Welsh: Great Basin Naturalist 58: 47. (1998)
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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