Astragalus iodanthus |
Astragalus iodanthus var. iodanthus |
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Humboldt River milkvetch |
Humboldt River milkvetch |
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Habit | Plants perennial, caulescent, strigillose to villosulous, hairs basifixed. | |
Stems | several, prostrate to decumbent, 3–40 cm. |
glabrate. |
Leaves | 2–8 cm; leaflets 7–21, obovate to oblong or oblanceolate to elliptic, 3–18 × 2–12 mm; tips truncate to retuse, obtuse or mucronate; surfaces sparsely strigose to glabrous; stipules 2–6 mm; free. |
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Inflorescences | racemes 7–21-flowered; peduncles 1–4.5 cm; bracts 1–3 mm; pedicels 0.3–2 mm; bracteoles 0–2. |
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Flowers | widely ascending or spreading at anthesis; calyces 3.3–8 mm, strigillose or rarely villosulous with black or mixture of black and white hairs; tubes 2.6–5 mm; teeth subulate or triangular, 1–3 mm; corollas 9–15.5 mm, bright purple to lilac or whitish, sometimes lilac-tinged or -tipped; ovules 14–30. |
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Calyces | (5)5.5–8 mm; tubes (3.4)3.7–5 mm; teeth (1.3)1.5–3 mm; corollas bright purple; banners 11–15 mm. |
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Fruits | unilocular to semibilocular, deflexed, humistrately spreading, lanceolate, linear-lanceolate or lance-elliptic, curved through a quarter- to half-circle or more, dorsiventrally or trigonously compressed, ventrally sulcate, 15–40 × 2.5–8.5 mm, often mottled, strigillose or glabrous; valves stiffly papery or subcoriaceous; stipes 0. |
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2n | =22.Sagebrush-bunchgrass communities. |
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Astragalus iodanthus |
Astragalus iodanthus var. iodanthus |
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Distribution | ||
Discussion | 2 varieties. |
Flowering May–Jul. 1300–2300 m. BR. CA, NV; southeast to UT. Native. |
Source | Flora of Oregon, volume 2, page 666 Richard Halse |
Flora of Oregon, volume 2, page 666 Richard Halse |
Sibling taxa | ||
Subordinate taxa | ||
Web links |