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Photo is of parent taxon

diehl's milkvetch

Photo is of parent taxon

flexile milkvetch

Herbage

greenish cinereous.

greenish or silky-canescent.

Stems

usually obviously flexuous, 15–30(–40) cm.

± flexuous, 15–60(–70) cm.

Leaflets

(7–)11–17, blades mostly linear or narrowly oblong-oblanceolate.

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

Racemes

12–26-flowered;

axis 2.5–9.5 cm in fruit.

(7–)12–26(–30)-flowered;

axis 3–13(–15) cm in fruit.

Peduncles

2.5–7 cm.

4–19 cm.

Flowers

7–9 mm;

calyx 3.3–4.1 mm, tube 1.9–2.3 mm, lobes 0.7–1.1(–1.4) mm;

corolla banner abruptly recurved through 90°;

keel very strongly incurved through 120°, semiorbiculate, 5–5.5 mm.

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

oblong-ellipsoid, turgid or inflated, 11–15(–20) × 3–4(–4.5) mm, strigulose;

sessile.

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

12–18.

14–20.

2n

= 22.

Astragalus flexuosus var. diehlii

Astragalus flexuosus var. flexuosus

Phenology Flowering late Apr–Jun. Flowering May–Aug.
Habitat Salt desert shrub and pinyon-juniper communities, on fine-textured substrates. Pinyon-juniper, sagebrush-oak, ponderosa pine, mountain brush, mesic prairies.
Elevation 1300–2100 m. (4300–6900 ft.) 200–2900 m. (700–9500 ft.)
Distribution
from FNA
AZ; CO; NM; UT
[BONAP county map]
from FNA
CO; IA; MN; MT; ND; NE; NM; SD; UT; WY; AB; BC; MB; ON; SK
[BONAP county map]
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Scytocarpi > Astragalus flexuosus Fabaceae > subfam. Faboideae > Astragalus > sect. Scytocarpi > Astragalus flexuosus
Sibling taxa
A. flexuosus var. flexuosus, A. flexuosus var. greenei
A. flexuosus var. diehlii, A. flexuosus var. greenei
Synonyms A. diehlii A. flexuosus var. elongatus
Name authority (M. E. Jones) Barneby: Leafl. W. Bot. 4: 54. (1944) unknown
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