Astragalus miser var. hylophilus |
Astragalus miser var. oblongifolius |
|
---|---|---|
woodlands weedy milkvetch, woody milkvetch |
Baker's weedy milkvetch, timber milkvetch |
|
Herbage | strigulose-pilosulous, hairs basifixed. |
strigulose-pilosulous, hairs basifixed. |
Stems | 1–15 cm. |
(1–)2–20(–24) cm. |
Leaves | (3–)4.5–19 cm; leaflets (9 or)11–21, blades narrowly to broadly elliptic, lanceolate, or lanceolate-oblong, (3–)5–26 mm, apex acute, obtuse, obtuse and apiculate, or, rarely, retuse, surfaces glabrous or sparsely pubescent. |
(2–)4–20 cm; leaflets (9 or)11–19(or 21), blades linear, narrowly oblong, or elliptic to broadly oblong or oval-elliptic, (3–)5–30(–42) mm, apex mostly acute, surfaces glabrous or glabrescent adaxially. |
Racemes | (3–)6–16-flowered; axis (1–)1.5–7(–7.5) cm in fruit. |
3–15(–20)-flowered; axis (1–)1.5—10 cm in fruit. |
Flowers | calyx (3.8–)4–5.6 mm, tube 2.6–3.5 mm, lobes (0.9–)1–2.3 mm; corolla whitish, sometimes purple-veined; banner (5.2–)6.5–13 mm; keel (7.1–)8–10(–11.4) mm. |
calyx (2.8–)3.4–5.2 mm, tube 2.2–2.9 mm, lobes (0.8–)1–1.2 mm; corolla whitish or suffused or lined with purple; banner (5.9–)6.5–9.5(–10.2) mm; keel 6.1–8.4 mm. |
Legumes | linear, linear-ellipsoid, or -oblanceoloid, (15–)18–25 × 2.5–4 mm, usually glabrous, rarely with few, scattered hairs. |
oblanceoloid, (12–)15–25 × (1.2–)2.3–4 mm, strigulose. |
Seeds | (6 or)7–11. |
13–19. |
2n | = 22. |
|
Astragalus miser var. hylophilus |
Astragalus miser var. oblongifolius |
|
Phenology | Flowering Jun–Aug. | Flowering late May–Aug. |
Habitat | Meadows, banks, open parklands with lodgepole pine, Douglas-fir, and ponderosa pine. | Sagebrush, oak, aspen, and spruce-fir or pine communities. |
Elevation | 900–2900 m. (3000–9500 ft.) | 1600–3500 m. (5200–11500 ft.) |
Distribution |
ID; MT; SD; WY |
AZ; CO; ID; MT; NM; NV; UT; WY |
Discussion | Variety hylophilus occurs in the Rocky Mountains of western Wyoming and western Montana (and immediately adjoining Idaho), and the Black Hills of South Dakota. Variety hylophilus is sympatric, in part, with vars. crispatus, miser, and tenuifolius. Its distinction may be preserved by ecological isolation; of the four varieties it is the most mesic, whereas the others are more xerophytic (D. Isely 1998). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety oblongifolius occurs in the southern Rocky Mountains of Colorado and Wyoming, westward across the Colorado Basin to eastern Nevada, montane Utah, central Arizona, and northwestern New Mexico. Variety oblongifolius forms extensive carpets in the forests of Colorado and Utah, where it is the only representative of the species. The New Mexico record likely represents a recent introduction (K. D. Heil and S. L. O’Kane 2007). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Homalobus hylophilus | Homalobus oblongifolius |
Name authority | (Rydberg) Barneby: Amer. Midl. Naturalist 55: 482. (1956) | (Rydberg) Cronquist: Leafl. W. Bot. 7: 18. (1953) |
Web links |