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horn loco milkvetch, mimic milkvetch

Habit Plants shortly caulescent or, sometimes, subacaulescent.
Stems

to 15 cm.

Racemes

(3–)5–15-flowered.

Flowers

calyx 5–5.8 mm, tube 4.1–4.8 mm, lobes 0.7–1.1 mm;

corolla bright pink-purple or violet-red, wings darker, banner with pale center;

banner 9.5–11.8 mm;

keel 8.9–10.6 mm.

Legumes

ascending, initially subterete or ± dorsiventrally compressed, incurved, subsymmetrically oblong-ellipsoid, somewhat laterally compressed and obtuse-angled when mature, 14–24 × 5–7.5(–9) mm, subunilocular, base obtuse or, sometimes, cuneate, apex abruptly contracted into subulate, pungent beak, sutures prominent, strigulose.

Seeds

36–46.

Astragalus missouriensis var. mimetes

Phenology Flowering Apr–May (Sep).
Habitat Larrea and juniper com­munities on barren limey knolls, with juniper and match­weed.
Elevation 1400–1800 m. (4600–5900 ft.)
Distribution
from FNA
AZ; NM
[BONAP county map]
Discussion

Variety mimetes occurs in the Rio Grande Valley in Valencia and Socorro counties, New Mexico, and in northeastern Arizona. In its small flowers and fruits, it resembles Astragalus accumbens, with which it has been confused.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Argophylli > Astragalus missouriensis
Sibling taxa
A. missouriensis var. amphibolus, A. missouriensis var. humistratus, A. missouriensis var. missouriensis
Name authority Barneby: Mem. New York Bot. Gard. 13: 716. (1964)
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