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Photo is of parent taxon

flexile milkvetch

Herbage

greenish or silky-canescent.

Stems

± flexuous, 15–60(–70) cm.

Leaflets

11–25(–29), blades mostly linear or narrowly oblong-oblanceolate, 6–11 mm.

Racemes

(7–)12–26(–30)-flowered;

axis 3–13(–15) cm in fruit.

Peduncles

4–19 cm.

Flowers

7.4–11 mm;

calyx 3.5–5.8 mm, tube 2.7–4.3 mm, lobes 0.5–1.7 mm;

corolla banner recurved through 45–50°;

keel incurved through 90–100°, semiobovate, 5.3–7.5 mm.

Legumes

linear-oblong, linear-oblanceoloid, or narrowly oblong-elliptic in outline, scarcely turgid, (8–)12–24 × 2.7–4.8 mm, base usually cuneate-tapered, usually finely strigulose or villosulous, rarely glabrous;

stipe 0.5–1.3 mm, concealed by marcescent calyx.

Seeds

14–20.

2n

= 22.

Astragalus flexuosus var. flexuosus

Phenology Flowering May–Aug.
Habitat Pinyon-juniper, sagebrush-oak, ponderosa pine, mountain brush, mesic prairies.
Elevation 200–2900 m. (700–9500 ft.)
Distribution
from FNA
CO; IA; MN; MT; ND; NE; NM; SD; UT; WY; AB; BC; MB; ON; SK
[BONAP county map]
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Scytocarpi > Astragalus flexuosus
Sibling taxa
A. flexuosus var. diehlii, A. flexuosus var. greenei
Synonyms A. flexuosus var. elongatus
Name authority unknown
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