Astragalus lentiginosus var. wahweapensis |
Astragalus lentiginosus var. pohlii |
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wahweap freckled milkvetch |
pohil's milkvetch, pohl's milkvetch |
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Habit | Plants perennial (short-lived, sometimes flowering first year), 10–25(–35) cm. | Plants perennial, 7–20 cm. |
Stems | diffuse and incurved-ascending. |
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Leaves | (2.5–)4–11 cm; leaflets 13–23, blades elliptic-oblanceolate, broadly oblong-oblanceolate, or obovate, (3–)5–17(–20) mm, apex obtuse or emarginate. |
(4–)5–9 cm; leaflets 11–17, blades broadly obovate-cuneate or suborbiculate, 4–11 mm, apex obtuse or retuse to emarginate. |
Racemes | 10–20-flowered, flowering from middle and distally, compact to loose in fruit; axis 1.5–5.5(–7) cm in fruit. |
shortly and loosely 3–9-flowered, short and compact in fruit; axis 1–3.5 cm in fruit. |
Peduncles | 2.5–6(–7.5) cm. |
1–4 cm. |
Flowers | (12.5–)15–18.2 mm; calyx (6.2–)7.5–10.5 mm, tube (4.6–)5.2–6.7 mm, lobes 1.4–3.8 mm; corolla usually bright pink-purple with pale, striate eye, rarely white (concolorous). |
20–23 mm; calyx 8.5–10.5 mm, tube 8–10 mm, lobes 2.4–3 mm; corolla whitish tinged with violet. |
Legumes | green, sometimes stramineous or purple-mottled, almost always very strongly incurved, very obliquely ovoid-acuminate, moderately or greatly inflated, 15–30(–40) × (7–)9–15 mm, bilocular, thinly papery, semitranslucent, seeds visible, to almost leathery, opaque, usually glabrous, rarely puberulent; beak well-defined, triangular or deltoid, 6–15 mm, unilocular. |
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. |
Seeds | (20–)24–28. |
24–32. |
Astragalus lentiginosus var. wahweapensis |
Astragalus lentiginosus var. pohlii |
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Phenology | Flowering Apr–Jul. | Flowering May–Jun. |
Habitat | Pinyon-juniper, sagebrush, and mixed desert shrub communities. | Greasewood, shadscale, horsebrush, and big sagebrush communities, vegetated sand dunes. |
Elevation | 1400–1900 m. (4600–6200 ft.) | 1300–1700 m. (4300–5600 ft.) |
Distribution |
AZ; UT |
UT |
Discussion | Variety wahweapensis may be very abundant in wetter years, filling the interspaces in pinyon-juniper woodland much like an alfalfa field. It is found on the plateaus and drainages affluent to Lake Powell in eastern Kane and Garfield counties in Utah, and in northern Arizona. Variety wahweapensis grades into the slender-podded var. palans to the east and the ovoid-fruited var. diphysus southward. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Name authority | S. L. Welsh: Great Basin Naturalist 38: 286. (1978) | S. L. Welsh & Barneby: Iselya 2: 1. (1981) |
Web links |