Astragalus lentiginosus var. pohlii |
Astragalus lentiginosus var. negundo |
|
---|---|---|
pohil's milkvetch, pohl's milkvetch |
||
Habit | Plants perennial, 7–20 cm. | Plants perennial, 19–32 cm. |
Stems | diffuse and incurved-ascending, often red- or purple-tinged. |
|
Leaves | (4–)5–9 cm; leaflets 11–17, blades broadly obovate-cuneate or suborbiculate, 4–11 mm, apex obtuse or retuse to emarginate. |
(2.5–)4–11 cm; leaflets (7–)13–19, blades elliptic-oblanceolate, broadly oblong-oblanceolate, or obovate, (2–)5–17 mm, apex obtuse or emarginate. |
Racemes | shortly and loosely 3–9-flowered, short and compact in fruit; axis 1–3.5 cm in fruit. |
5–11-flowered, flowering from middle and distally, short and compact in fruit; axis 0.5–5 cm in fruit. |
Peduncles | 1–4 cm. |
2.2–5 cm. |
Flowers | 20–23 mm; calyx 8.5–10.5 mm, tube 8–10 mm, lobes 2.4–3 mm; corolla whitish tinged with violet. |
12.5–14.5 mm; calyx 7.5–10.2 mm, tube 5.2–5.8 mm, lobes 1.8–4.4 mm; corolla bright pink-purple with pale, striate eye. |
Legumes | pale green or purple-speckled becoming stramineous or brownish, plumply ovoid, strongly inflated, 23–33 × 10–15 mm, ± bilocular, leathery or stiffly papery, minutely strigulose; beak 5–15 mm, unilocular; stipe 0.5–1.5 mm. |
purplish, often red-mottled, becoming stramineous, ellipsoid to lanceoloid-ovoid or ellipsoid-acuminate, moderately inflated, 23–34 × 6–15 mm, bilocular, stiffly papery or almost leathery, usually glabrous, rarely puberulent; beak well-defined, triangular or deltoid, 7–12 mm, unilocular. |
Seeds | 24–32. |
40. |
Astragalus lentiginosus var. pohlii |
Astragalus lentiginosus var. negundo |
|
Phenology | Flowering May–Jun. | Flowering late Apr–Jun. |
Habitat | Greasewood, shadscale, horsebrush, and big sagebrush communities, vegetated sand dunes. | Salt and sand desert shrub communities with shadscale, greasewood, sagebrush, and horsebrush, in pinyon-juniper communities. |
Elevation | 1300–1700 m. (4300–5600 ft.) | 1400–1700(–2300) m. (4600–5600(–7500) ft.) |
Distribution |
UT |
UT |
Discussion | Variety pohlii is restricted to the Rush and Skull valleys in Tooele County. The shortly stipitate fruit is unusual among varieties of Astragalus lentiginosus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety negundo, which is known from Box Elder, Millard, and Tooele counties, fills a portion of the gap in distribution between var. platyphyllidius, with which it shares relatively thick-textured fruits, and var. chartaceus, with which it is transitional to the south. From either taxon, the elongated fruit is evidently diagnostic, apparent only as fruits approach maturity. The lower flower number is characteristic of var. negundo and is more or less diagnostic. (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 & Barneby: Iselya 2: 1. (1981) | S. L. Welsh & N. D. Atwood in S. L. Welsh: N. Amer. Sp. Astragalus, 302, fig. 285u. (2007) |
Web links |