Astragalus miser var. praeteritus |
Astragalus miser var. crispatus |
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Yellowstone milkvetch |
Jones' weedy milkvetch, timber milkvetch |
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Herbage | strigulose, hairs obscurely malpighian, silvery cinereous, ± straight. |
villosulous or villous and pilosulous, hairs obscurely malpighian, gray or silvery, mostly twisted and loose. |
Stems | (1.5–)2.5–20 cm. |
2.5–15 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. |
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 | loosely (3–)5–12-flowered; axis (1–)1.5–7.5 cm in fruit. |
9–17-flowered; axis 2–5.5 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 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 or linear-oblanceoloid, 11–20 × (2–)2.5–3.4 mm, strigulose. |
linear-oblong, 14–17 × 2.5–3 mm, minutely villosulous, hairs twisted. |
Seeds | 7–11. |
6–13. |
Astragalus miser var. praeteritus |
Astragalus miser var. crispatus |
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Phenology | Flowering May–Aug. | Flowering Jun–Aug. |
Habitat | Banks, hillsides, gravelly ridges, in sagebrush upward into lodgepole pine forest. | Pine woodlands, sagebrush flats. |
Elevation | 2200–2900 m. (7200–9500 ft.) | 1200–1300 m. (3900–4300 ft.) |
Distribution |
ID; MT; WY |
ID; MT |
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 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 | A. campestris var. crispatus | |
Name authority | Barneby: Amer. Midl. Naturalist 55: 483. (1956) | (M. E. Jones) Cronquist: Leafl. W. Bot. 7: 18. (1953) |
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