Astragalus miser var. decumbens |
Astragalus miser var. tenuifolius |
|
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prostrate milkvetch, reclining weedy milkvetch |
Garrett's weedy milkvetch, timber milkvetch |
|
Herbage | strigulose, hairs obscurely malpighian, silvery-silky, ± straight. |
strigose, hairs basifixed. |
Stems | 1–15(–22) cm. |
1–11(–15) cm. |
Leaves | 1.5–9(–12) cm; leaflets (7 or)9–15(or 17), blades narrowly elliptic to oval-lanceolate, leaflets subtending racemes more broadly elliptic or oblanceolate, (2–)4–16(–20) mm, apex acute to obtuse, surfaces pubescent; terminal leaflet decurrent or jointed. |
(1.5–)2.5–9(–10.5) cm; leaflets (3–)7–11, blades linear, narrowly linear-elliptic, or (distally) filiform-subulate, 2–10(–20) mm, apex sharply acute, surfaces pubescent or glabrescent. |
Racemes | (4–)7–17-flowered; axis 1–3(–4) cm in fruit. |
3–6(–12)-flowered; axis 1–5(–7.5) cm in fruit. |
Flowers | calyx 2.8–4.3 mm, tube 1.8–2.5 mm, lobes 0.9–1.9 mm; corolla usually pink-purple, purplish, bluish, or dull purple, sometimes pallid or whitish, except maculate keel; banner 6.9–9.6 mm; keel 6.2–7.8 mm. |
calyx 2.4–3.5 mm, tube 1.9–2.5 mm, lobes 0.5–1.1 mm; corolla usually whitish or suffused, rarely ochroleucous; banner 6–8 mm; keel 5.9–7 mm. |
Legumes | linear-oblong or -oblanceoloid, (12–)14–21 × 2.2–3.3 mm. |
linear (in profile), 12–16 × 2–2.7 mm, strigulose. |
Seeds | 12–18. |
8–12. |
Astragalus miser var. decumbens |
Astragalus miser var. tenuifolius |
|
Phenology | Flowering May–Aug. | Flowering Jun–Aug. |
Habitat | Banks, hillsides, bluffs, ridge crests, with sagebrush, with limber pine and juniper. | Hillsides, bluffs, mountain crests, in sagebrush. |
Elevation | 1100–2600 m. (3600–8500 ft.) | 1600–3200 m. (5200–10500 ft.) |
Distribution |
ID; MT; WY |
ID; MT; NV; UT; WY |
Discussion | Variety decumbens occurs from southern Montana on the Yellowstone River, southward (mostly eastward of the Continental Divide except on upper Green River) to central Wyoming. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety tenuifolius is most abundant in eastern Idaho with a range that extends into southwestern Montana, western Wyoming, northeastern Nevada, and northern Utah. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Homalobus decumbens | Homalobus tenuifolius |
Name authority | (Nuttall) Cronquist: Leafl. W. Bot. 7: 18. (1953) | (Nuttall) Barneby: Leafl. W. Bot. 7: 195. (1954) |
Web links |