Astragalus miser var. praeteritus |
Astragalus miser var. miser |
|
---|---|---|
Yellowstone milkvetch |
timber milk-vetch, weedy milk-vetch |
|
Herbage | strigulose, hairs obscurely malpighian, silvery cinereous, ± straight. |
strigulose-pilosulous, hairs basifixed, silvery or cinereous. |
Stems | (1.5–)2.5–20 cm. |
(5–)8–32 cm. |
Leaves | (1.5–2.5–9.5 cm; leaflets 7–13(–17), blades linear to linear-elliptic or oblong-elliptic, 2–20 mm, apex attenuate to acute, surfaces pubescent; terminal leaflet confluent with rachis. |
4–14(–17) cm; leaflets 9–19, blades linear-elliptic to narrowly linear, 3–26(–30) mm, apex acute, surfaces pubescent. |
Racemes | loosely (3–)5–12-flowered; axis (1–)1.5–7.5 cm in fruit. |
loosely (5–)7–19-flowered; axis (2–)4–12 cm in fruit. |
Flowers | calyx (2.3–)2.8–3.9 mm, tube (1.7–)2.2–2.9 mm, lobes 0.6–1.4 mm; corolla whitish, ochroleucous, or stramineous, sometimes brownish-veined, keel apex maculate; banner 6.6–8.6 mm; keel 6.2–8.3(–8.8) mm. |
calyx (4.2–)4.6–6 mm, tube 2.6–4.2 mm, lobes (1.4–)1.8–2.6 mm; corolla lilac or pink-purple; banner (9.5–)9.8–12 mm; keel (7.8–)8.6–10.7 mm. |
Legumes | linear or linear-oblanceoloid, 11–20 × (2–)2.5–3.4 mm, strigulose. |
linear-oblong or linear-ellipsoid, 15–22(–25) × (2.5–)3–4 mm, densely strigulose. |
Seeds | 7–11. |
8–12(–17). |
2n | = 22. |
|
Astragalus miser var. praeteritus |
Astragalus miser var. miser |
|
Phenology | Flowering May–Aug. | Flowering late Apr–early Aug. |
Habitat | Banks, hillsides, gravelly ridges, in sagebrush upward into lodgepole pine forest. | Ridges, flats, meadows, grasslands, shrublands, open forests. |
Elevation | 2200–2900 m. (7200–9500 ft.) | 300–1400 m. (1000–4600 ft.) |
Distribution |
ID; MT; WY |
ID; MT; WA; AB; BC |
Discussion | Variety praeteritus occurs in southwestern Montana on the upper forks of the Missouri River to adjoining east-central Idaho, to Yellowstone Park and Grand Tetons in northwestern Wyoming. D. Isely (1998) stated that var. praeteritus represents the more northern aspects of an expanded var. tenuifolius, based on the presence of malpighian pubescence, and he synonymized the two under the latter name. He was unsuccessful in correlating pubescence with geography. It is probable that the two varieties are best combined, but there is a tendency for plants of var. praeteritus to have broader leaflets. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety miser is known from southern British Columbia and extreme southwestern Alberta across northeastern Washington to western Montana. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. strigosus | |
Name authority | Barneby: Amer. Midl. Naturalist 55: 483. (1956) | unknown |
Web links |