Astragalus flexuosus var. greenei |
Astragalus flexuosus var. diehlii |
|
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Greene's milkvetch |
diehl's milkvetch |
|
Herbage | greenish cinereous. |
greenish cinereous. |
Stems | 15–40 cm. |
usually obviously flexuous, 15–30(–40) cm. |
Leaflets | (9–)13–23, blades linear-oblong to obovate-cuneate. |
(7–)11–17, blades mostly linear or narrowly oblong-oblanceolate. |
Racemes | (7–)10–30-flowered; axis (1–)2.5–10 cm in fruit. |
12–26-flowered; axis 2.5–9.5 cm in fruit. |
Peduncles | 1.5–13.5 cm. |
2.5–7 cm. |
Flowers | 9–10.8 mm; calyx 3.5–6 mm, tube 2.8–4.2 mm, lobes 0.8–2 mm; corolla banner recurved through 45–50°; keel incurved through 90–100°, semiobovate, 7–8.2 mm. |
7–9 mm; calyx 3.3–4.1 mm, tube 1.9–2.3 mm, lobes 0.7–1.1(–1.4) mm; corolla banner abruptly recurved through 90°; keel very strongly incurved through 120°, semiorbiculate, 5–5.5 mm. |
Legumes | lanceoloid-ellipsoid to plumply ellipsoid, oblong-ellipsoid, or ovoid-ellipsoid, turgid or inflated, (12–)14–23 × (4–)5–9 mm, base rounded when less than 5 mm wide, strigulose or villosulous; stipe 0–0.5 mm. |
oblong-ellipsoid, turgid or inflated, 11–15(–20) × 3–4(–4.5) mm, strigulose; sessile. |
Seeds | 16–25. |
12–18. |
2n | = 22. |
|
Astragalus flexuosus var. greenei |
Astragalus flexuosus var. diehlii |
|
Phenology | Flowering Apr–Jun. | Flowering late Apr–Jun. |
Habitat | Badlands, other semibarrens with pinyon-juniper or oak. | Salt desert shrub and pinyon-juniper communities, on fine-textured substrates. |
Elevation | 1300–2600 m. (4300–8500 ft.) | 1300–2100 m. (4300–6900 ft.) |
Distribution |
AZ; NM |
AZ; CO; NM; UT |
Discussion | Variety greenei closely resembles var. diehlii and, except for a small geographical disjunction, they easily could be combined. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. greenei | A. diehlii |
Name authority | (A. Gray) Barneby: Leafl. W. Bot. 9: 91. (1960) | (M. E. Jones) Barneby: Leafl. W. Bot. 4: 54. (1944) |
Web links |