Astragalus lentiginosus var. trumbullensis |
Astragalus lentiginosus var. semotus |
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freckled milkvetch, Mount Trumbull milkvetch |
freckled milkvetch, White Mountains milk vetch |
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Habit | Plants perennial, 30–45(–65) cm, herbage green or subglabrescent. | Plants perennial, 5–10(–20) cm, herbage subappressed-strigulose. |
Leaves | 2–9.5(–10.5) cm; leaflets (7–)13–17, blades broadly obovate to oblanceolate or elliptic, 5–15 mm, apex retuse to round or subacute, adaxial surface usually strigose to strigulose, sometimes glabrate or glabrous. |
4–9 cm; leaflets (13–)17–27, distant, blades oblanceolate, oblong-oval, or oblong-elliptic, 2–9 mm, apex obtuse or emarginate. |
Racemes | loosely 4–15(–17)-flowered; axis elongating, 3–9.5 cm in fruit. |
6–10-flowered, short and compact in fruit; axis 1–3 cm in fruit. |
Peduncles | 4.5–7.5 cm. |
0.6–1.5 cm. |
Flowers | 13–17 mm; calyx 6.3–7.4 mm, tube 4.8–5.5 mm, lobes 1.7–2 mm; corolla pink- or red-purple, sometimes with pale or white wing tips. |
10.4–12 mm; calyx 5.2–7.3 mm, tube 3.6–5 mm, lobes 1.5–2.6 mm; corolla whitish. |
Legumes | evidently persistent, stramineous or mottled, linear-oblong to oblong or narrowly ellipsoid, not or scarcely inflated, 17–32 × 4–5.5(–7.5) mm, ± bilocular, somewhat fleshy becoming leathery or stiffly papery, strigulose; beak 3–5 mm, unilocular; stipe 0.1–1 mm. |
mottled, ovoid-acuminate, bladdery-inflated, 11–20(–23) × 6–12 mm, papery, sparsely strigulose; beak incurved, deltoid, 4–7 mm, unilocular. |
Seeds | 14–28. |
13–15. |
2n | = 22. |
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Astragalus lentiginosus var. trumbullensis |
Astragalus lentiginosus var. semotus |
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Phenology | Flowering Apr (Sep). | Flowering Jun–Aug. |
Habitat | Sandstone outcrops and gravel, with Agave, Ephedra, Mortonia, Purshia, and other warm-desert shrubs. | Among sagebrush, with bristlecone pine. |
Elevation | 900–1800 m. (3000–5900 ft.) | 2100–3500 m. (6900–11500 ft.) |
Distribution |
AZ |
CA; NV |
Discussion | Variety trumbullensis is restricted to Mohave County. It is closely related to vars. mokiacensis and palans, weakly differentiated by a series of features that intergrade insensibly but taken in combination are more or less diagnostic (as is true for most members of the lentiginosus complex). J. A. Alexander (2005) provided statistical evidence that this variety is indistinguishable from var. mokiacensis (as Astragalus mokiacensis), and he considered the two synonymous. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety semotus, similar to var. ineptus, occurs in the Inyo and White mountains in Inyo and Mono counties, California, and Esmeralda County, Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Name authority | S. L. Welsh & N. D. Atwood: Rhodora 103: 81, fig. 3. (2001) | Jepson: Fl. Calif. 2: 357. (1936) |
Web links |