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Photo is of parent taxon

Yellowstone milkvetch

Photo is of parent taxon

timber milk-vetch, weedy milk-vetch

Herbage

strigulose, hairs obscurely malpighian, silvery cinereous, ± straight.

strigulose-pilosulous, hairs basifixed, silvery or cinereous.

Stems

(1.5–)2.5–20 cm.

(5–)8–32 cm.

Leaves

(1.5–2.5–9.5 cm; leaflets 7–13(–17), blades linear to linear-elliptic or oblong-elliptic, 2–20 mm, apex attenuate to acute, surfaces pubescent;

terminal leaflet confluent with rachis.

4–14(–17) cm;

leaflets 9–19, blades linear-elliptic to narrowly linear, 3–26(–30) mm, apex acute, surfaces pubescent.

Racemes

loosely (3–)5–12-flowered;

axis (1–)1.5–7.5 cm in fruit.

loosely (5–)7–19-flowered;

axis (2–)4–12 cm in fruit.

Flowers

calyx (2.3–)2.8–3.9 mm, tube (1.7–)2.2–2.9 mm, lobes 0.6–1.4 mm;

corolla whitish, ochroleucous, or stramineous, sometimes brownish-veined, keel apex maculate;

banner 6.6–8.6 mm;

keel 6.2–8.3(–8.8) mm.

calyx (4.2–)4.6–6 mm, tube 2.6–4.2 mm, lobes (1.4–)1.8–2.6 mm;

corolla lilac or pink-purple;

banner (9.5–)9.8–12 mm;

keel (7.8–)8.6–10.7 mm.

Legumes

linear or linear-oblanceoloid, 11–20 × (2–)2.5–3.4 mm, strigulose.

linear-oblong or linear-ellipsoid, 15–22(–25) × (2.5–)3–4 mm, densely strigulose.

Seeds

7–11.

8–12(–17).

2n

= 22.

Astragalus miser var. praeteritus

Astragalus miser var. miser

Phenology Flowering May–Aug. Flowering late Apr–early Aug.
Habitat Banks, hillsides, gravelly ridges, in sagebrush upward into lodgepole pine forest. Ridges, flats, mead­ows, grasslands, shrublands, open forests.
Elevation 2200–2900 m. (7200–9500 ft.) 300–1400 m. (1000–4600 ft.)
Distribution
from FNA
ID; MT; WY
[BONAP county map]
from FNA
ID; MT; WA; AB; BC
[BONAP county map]
Discussion

Variety praeteritus occurs in southwestern Montana on the upper forks of the Missouri River to adjoining east-central Idaho, to Yellowstone Park and Grand Tetons in northwestern Wyoming.

D. Isely (1998) stated that var. praeteritus represents the more northern aspects of an expanded var. tenuifolius, based on the presence of malpighian pubescence, and he synonymized the two under the latter name. He was unsuccessful in correlating pubescence with geography. It is probable that the two varieties are best combined, but there is a tendency for plants of var. praeteritus to have broader leaflets.

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

Variety miser is known from southern British Columbia and extreme southwestern Alberta across northeastern Washington to western Montana.

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

Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Astragalus > sect. Genistoidei > Astragalus miser Fabaceae > subfam. Faboideae > Astragalus > sect. Genistoidei > Astragalus miser
Sibling taxa
A. miser var. crispatus, A. miser var. decumbens, A. miser var. hylophilus, A. miser var. miser, A. miser var. oblongifolius, A. miser var. serotinus, A. miser var. tenuifolius
A. miser var. crispatus, A. miser var. decumbens, A. miser var. hylophilus, A. miser var. oblongifolius, A. miser var. praeteritus, A. miser var. serotinus, A. miser var. tenuifolius
Synonyms A. strigosus
Name authority Barneby: Amer. Midl. Naturalist 55: 483. (1956) unknown
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