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Photo is of parent taxon

Yellowstone milkvetch

Photo is of parent taxon

Jones' weedy milkvetch, timber milkvetch

Herbage

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

villosulous or villous and pilosulous, hairs obscurely malpighian, gray or silvery, mostly twisted and loose.

Stems

(1.5–)2.5–20 cm.

2.5–15 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.

1.5–8 cm;

leaflets (9 or)11–17, blades narrowly elliptic or oblong-elliptic, 3–16(–20) mm, apex acute or shortly acuminate, surfaces pubescent;

terminal leaflet decurrent or obscurely jointed.

Racemes

loosely (3–)5–12-flowered;

axis (1–)1.5–7.5 cm in fruit.

9–17-flowered;

axis 2–5.5 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 3.7–4.7 mm, tube 2.4–2.8 mm, lobes 1.1–2.4 mm;

corolla whitish or ochroleucous, sometimes faintly lavender-tinged or -veined;

banner 9.2–10.4 mm;

keel 7.7–8.3 mm.

Legumes

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

linear-oblong, 14–17 × 2.5–3 mm, minutely villosulous, hairs twisted.

Seeds

7–11.

6–13.

Astragalus miser var. praeteritus

Astragalus miser var. crispatus

Phenology Flowering May–Aug. Flowering Jun–Aug.
Habitat Banks, hillsides, gravelly ridges, in sagebrush upward into lodgepole pine forest. Pine woodlands, sagebrush flats.
Elevation 2200–2900 m. (7200–9500 ft.) 1200–1300 m. (3900–4300 ft.)
Distribution
from FNA
ID; MT; WY
[BONAP county map]
from FNA
ID; MT
[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 crispatus is among the most restricted of the varieties in the species, occurring only in the Bitterroot Mountains, in east-central Idaho and adjoining Montana. It is geographically peripheral to var. tenuifolius, and some plants intergrade.

(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. decumbens, A. miser var. hylophilus, A. miser var. miser, A. miser var. oblongifolius, A. miser var. praeteritus, A. miser var. serotinus, A. miser var. tenuifolius
Synonyms A. campestris var. crispatus
Name authority Barneby: Amer. Midl. Naturalist 55: 483. (1956) (M. E. Jones) Cronquist: Leafl. W. Bot. 7: 18. (1953)
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