Astragalus miser var. decumbens |
Astragalus miser var. crispatus |
|
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prostrate milkvetch, reclining weedy milkvetch |
Jones' weedy milkvetch, timber milkvetch |
|
Herbage | strigulose, hairs obscurely malpighian, silvery-silky, ± straight. |
villosulous or villous and pilosulous, hairs obscurely malpighian, gray or silvery, mostly twisted and loose. |
Stems | 1–15(–22) cm. |
2.5–15 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. |
1.5–8 cm; leaflets (9 or)11–17, blades narrowly elliptic or oblong-elliptic, 3–16(–20) mm, apex acute or shortly acuminate, surfaces pubescent; terminal leaflet decurrent or obscurely jointed. |
Racemes | (4–)7–17-flowered; axis 1–3(–4) cm in fruit. |
9–17-flowered; axis 2–5.5 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 3.7–4.7 mm, tube 2.4–2.8 mm, lobes 1.1–2.4 mm; corolla whitish or ochroleucous, sometimes faintly lavender-tinged or -veined; banner 9.2–10.4 mm; keel 7.7–8.3 mm. |
Legumes | linear-oblong or -oblanceoloid, (12–)14–21 × 2.2–3.3 mm. |
linear-oblong, 14–17 × 2.5–3 mm, minutely villosulous, hairs twisted. |
Seeds | 12–18. |
6–13. |
Astragalus miser var. decumbens |
Astragalus miser var. crispatus |
|
Phenology | Flowering May–Aug. | Flowering Jun–Aug. |
Habitat | Banks, hillsides, bluffs, ridge crests, with sagebrush, with limber pine and juniper. | Pine woodlands, sagebrush flats. |
Elevation | 1100–2600 m. (3600–8500 ft.) | 1200–1300 m. (3900–4300 ft.) |
Distribution |
ID; MT; WY |
ID; MT |
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 crispatus is among the most restricted of the varieties in the species, occurring only in the Bitterroot Mountains, in east-central Idaho and adjoining Montana. It is geographically peripheral to var. tenuifolius, and some plants intergrade. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Homalobus decumbens | A. campestris var. crispatus |
Name authority | (Nuttall) Cronquist: Leafl. W. Bot. 7: 18. (1953) | (M. E. Jones) Cronquist: Leafl. W. Bot. 7: 18. (1953) |
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