Coachella milkvetch, Coachella Valley milk vetch, Palm Springs freckled milkvetch
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freckled milkvetch, straw milkvetch
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Plants winter-annual or perennial (short-lived, often flowering first year), clump-forming, (10–)15–30(–55) cm, herbage silvery-canescent, hairs to 0.7–1.2 mm. |
Plants perennial (short-lived), 12–40(–65) cm, herbage cinereous or green. |
erect and ascending. |
ashy canescent or green. |
5–11.5 cm; leaflets (7–)11–17(–21), blades broadly oval to obovate-cuneate or oblong-elliptic, 5–15(–17) mm, apex emarginate, or obtuse and apiculate. |
(2.5–)4–11(–13) cm; leaflets (9 or)11–15, blades broadly oblanceolate or obovate-cuneate, (3–)5–18 mm, apex openly notched. |
loosely 11–25-flowered, lax and open in fruit; axis (3–)4–10 cm in fruit. |
loosely or remotely 15–25(–30)-flowered, lax and open in fruit; axis 5–18 cm in fruit. |
3.5–8 cm. |
3.5–9 cm. |
12.7–14.5 mm; calyx 6.6–7.8 mm, tube 4.5–5.3 mm, lobes 1.7–2.9 mm; corolla pink-purple. |
11–12 mm; calyx 5–6.6 mm, tube 3.8–4.5 mm, lobes 1.2–2.1 mm; corolla pale purple. |
usually mottled, broadly and obliquely ovoid-acuminate, greatly inflated, 16–21 × 9–14 mm, bilocular, stiffly papery, canescent-strigulose; beak 3.5–6 mm, unilocular. |
greenish, usually mottled, becoming stramineous, obliquely ovoid-acuminate, bladdery-inflated, (10–)17–26 × 10–16 mm, bilocular, somewhat stiffly papery, opaque, strigulose; beak (2–)3–7 mm, unilocular. |
24–30. |
20–26. |
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Flowering Feb–May. |
Flowering Apr–May. |
Sandy flats, washes, outwash fans, on dunes, in Larrea belt. |
Mixed warm-desert shrub communities. |
-10–400 m. (-0–1300 ft.) |
900–1000 m. (3000–3300 ft.) |
CA |
AZ; NV; UT |
Variety coachellae occurs at low elevations in and around the Coachella Valley in Riverside County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety stramineus is the only member of the species with moderate-sized, pale purple flowers known to occur in Washington County in Utah, and adjacent Arizona and Nevada; it is similar to the slightly smaller-flowered var. fremontii and to var. ambiguus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
FNA vol. 11. |
FNA vol. 11. |
Fabaceae > subfam. Faboideae > Astragalus > sect. Diphysi > Astragalus lentiginosus |
Fabaceae > subfam. Faboideae > Astragalus > sect. Diphysi > Astragalus lentiginosus |
A. lentiginosus var. albifolius, A. lentiginosus var. ambiguus, A. lentiginosus var. antonius, A. lentiginosus var. australis, A. lentiginosus var. chartaceus, A. lentiginosus var. coulteri, A. lentiginosus var. diphysus, A. lentiginosus var. floribundus, A. lentiginosus var. fremontii, A. lentiginosus var. higginsii, A. lentiginosus var. idriensis, A. lentiginosus var. ineptus, A. lentiginosus var. kennedyi, A. lentiginosus var. kernensis, A. lentiginosus var. latus, A. lentiginosus var. lentiginosus, A. lentiginosus var. macrolobus, A. lentiginosus var. maricopae, A. lentiginosus var. micans, A. lentiginosus var. mokiacensis, A. lentiginosus var. multiracemosus, A. lentiginosus var. negundo, A. lentiginosus var. nigricalycis, A. lentiginosus var. oropedii, A. lentiginosus var. palans, A. lentiginosus var. piscinensis, A. lentiginosus var. platyphyllidius, A. lentiginosus var. pohlii, A. lentiginosus var. salinus, A. lentiginosus var. scorpionis, A. lentiginosus var. semotus, A. lentiginosus var. sesquimetralis, A. lentiginosus var. sierrae, A. lentiginosus var. stramineus, A. lentiginosus var. toyabensis, A. lentiginosus var. trumbullensis, A. lentiginosus var. variabilis, A. lentiginosus var. vitreus, A. lentiginosus var. wahweapensis, A. lentiginosus var. wilsonii, A. lentiginosus var. yuccanus |
A. lentiginosus var. albifolius, A. lentiginosus var. ambiguus, A. lentiginosus var. antonius, A. lentiginosus var. australis, A. lentiginosus var. chartaceus, A. lentiginosus var. coachellae, A. lentiginosus var. coulteri, A. lentiginosus var. diphysus, A. lentiginosus var. floribundus, A. lentiginosus var. fremontii, A. lentiginosus var. higginsii, A. lentiginosus var. idriensis, A. lentiginosus var. ineptus, A. lentiginosus var. kennedyi, A. lentiginosus var. kernensis, A. lentiginosus var. latus, A. lentiginosus var. lentiginosus, A. lentiginosus var. macrolobus, A. lentiginosus var. maricopae, A. lentiginosus var. micans, A. lentiginosus var. mokiacensis, A. lentiginosus var. multiracemosus, A. lentiginosus var. negundo, A. lentiginosus var. nigricalycis, A. lentiginosus var. oropedii, A. lentiginosus var. palans, A. lentiginosus var. piscinensis, A. lentiginosus var. platyphyllidius, A. lentiginosus var. pohlii, A. lentiginosus var. salinus, A. lentiginosus var. scorpionis, A. lentiginosus var. semotus, A. lentiginosus var. sesquimetralis, A. lentiginosus var. sierrae, A. lentiginosus var. toyabensis, A. lentiginosus var. trumbullensis, A. lentiginosus var. variabilis, A. lentiginosus var. vitreus, A. lentiginosus var. wahweapensis, A. lentiginosus var. wilsonii, A. lentiginosus var. yuccanus |
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Cystium stramineum |
Barneby in F. Shreve and I. L. Wiggins: Veg. Fl. Sonoran Desert, 695. (1964) |
(Rydberg) Barneby: Leafl. W. Bot. 4: 122. (1945) |
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