Astragalus lentiginosus var. lentiginosus |
Astragalus lentiginosus var. trumbullensis |
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freckled milk-vetch, specklepod milk-vetch |
freckled milkvetch, Mount Trumbull milkvetch |
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Habit | Plants perennial, 10–30(–50) cm, sparsely strigulose. | Plants perennial, 30–45(–65) cm, herbage green or subglabrescent. |
Leaves | 3–10 cm; leaflets (5–)9–17(or 19), blades broadly obovate, obovate-cuneate, or oblong-elliptic to suborbiculate or oblanceolate, (3–)5–15 mm, apex retuse or obtuse. |
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. |
Racemes | 8–18(–22)-flowered; axis 0.5–3(–3.5) cm in fruit. |
loosely 4–15(–17)-flowered; axis elongating, 3–9.5 cm in fruit. |
Peduncles | 1–3.5 cm. |
4.5–7.5 cm. |
Flowers | 7.4–11 mm; calyx 4.1–6.4 mm, tube 2.8–4.2 mm, lobes 1–2.2 mm; corolla whitish or yellowish, sometimes faintly lilac. |
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. |
Legumes | green, usually mottled, becoming stramineous or brownish, obliquely ovoid-acuminate to lanceoloid-acuminate, strongly to scarcely inflated, 10–23 × (3–)4.5–10 mm, semibilocular, stiffly papery, opaque or nearly so, usually thinly strigulose, rarely puberulent; beak 4–9 mm, unilocular. |
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. |
Seeds | (15 or)16–21. |
14–28. |
2n | = 22. |
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Astragalus lentiginosus var. lentiginosus |
Astragalus lentiginosus var. trumbullensis |
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Phenology | Flowering May–early Jul. | Flowering Apr (Sep). |
Habitat | Often on volcanic soils, on basalt, with sagebrush and bunchgrass, in ponderosa pine and western juniper communities. | Sandstone outcrops and gravel, with Agave, Ephedra, Mortonia, Purshia, and other warm-desert shrubs. |
Elevation | 200–1500 m. (700–4900 ft.) | 900–1800 m. (3000–5900 ft.) |
Distribution |
CA; ID; NV; OR; WA; BC |
AZ |
Discussion | Variety lentiginosus is widespread in the northern part of its range and is partially sympatric with vars. platyphyllidius and salinus in the southern part of its range. It is transitional to both. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. lentiginosus var. carinatus | |
Name authority | unknown | S. L. Welsh & N. D. Atwood: Rhodora 103: 81, fig. 3. (2001) |
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