Flora of North America species comparison

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Astragalus conjunctus var. conjunctus
Photo is of parent taxon

basalt milkvetch, Idaho milkvetch, John Day Valley milkvetch, stiff milkvetch
Racemes

7–17(–20)-flowered;

axis (3–)4–12(–15) cm in fruit.
Peduncles

10–33 cm.
Pedicels

1–4.5 mm.
Flowers

16–25.5 mm;

calyx cylindric or subcylindric, (7–)8.5–12 mm, tube (5.7–)6–9.2 mm, lobes 1.3–3(–4) mm.
Legumes

12–25 × 5–8 mm, glabrous.
Seeds

23–30.
2n

= 24.

Astragalus conjunctus var. conjunctus
Phenology Flowering mid Apr–Jun.
Habitat Meadows, brushy slopes, grasslands, sagebrush desert, pine forests, on basaltic bedrock.
Elevation 400–1600 m. (1300–5200 ft.)
Distribution
from FNA
ID; OR; WA
[BONAP county map]
Discussion

Variety conjunctus is most easily recognized in bloom, the long, narrow flowers, with their cylindric calyces and, usually, lilac- or purple-tinged petals being diagnostic. When in fruit, it is easily confused with the narrow-fruited form of Astragalus reventiformis, a species of the inner slope of the Cascade Range in Washington.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Conjuncti > Astragalus conjunctus
Sibling taxa
A. conjunctus var. rickardii
Name authority unknown
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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