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woodlands weedy milkvetch, woody milkvetch

Habit Herbs perennial, caulescent; caudex superficial or subterranean.
Herbage

strigulose-pilosulous, hairs basifixed.

Stems

1–15 cm.

few or several to many.

Leaves

(3–)4.5–19 cm;

leaflets (9 or)11–21, blades narrowly to broadly elliptic, lanceolate, or lanceolate-oblong, (3–)5–26 mm, apex acute, obtuse, obtuse and apiculate, or, rarely, retuse, surfaces glabrous or sparsely pubescent.

odd-pinnate, petiolate to short-petiolate;

leaflets (1 or)3–21, or reduced to phyllodium, sometimes terminal leaflet decurrent and not jointed to rachis.

Racemes

(3–)6–16-flowered;

axis (1–)1.5–7(–7.5) cm in fruit.

loosely flowered, flowers often ascending then declined.

Flowers

calyx (3.8–)4–5.6 mm, tube 2.6–3.5 mm, lobes (0.9–)1–2.3 mm;

corolla whitish, sometimes purple-veined;

banner (5.2–)6.5–13 mm;

keel (7.1–)8–10(–11.4) mm.

Corollas

whitish, ochroleucous, lilac, or purple to pink-purple, banner recurved through 40–90°, keel apex obtuse, broadly triangular, or acute-triangular and beaklike.

Calyx

tubes campanulate.

Legumes

linear, linear-ellipsoid, or -oblanceoloid, (15–)18–25 × 2.5–4 mm, usually glabrous, rarely with few, scattered hairs.

persistent, sessile or substipitate, declined-pendulous, spreading, or ascending, linear to linear-ellipsoid, oblanceoloid, or narrowly oblong, laterally compressed and 2-sided, unilocular.

Seeds

(6 or)7–11.

6–26.

Hairs

basifixed or malpighian.

Stipules

connate or distinct at distal nodes.

Astragalus miser var. hylophilus

Astragalus sect. Genistoidei

Phenology Flowering Jun–Aug.
Habitat Meadows, banks, open park­lands with lodgepole pine, Douglas-fir, and ponderosa pine.
Elevation 900–2900 m. (3000–9500 ft.)
Distribution
from FNA
ID; MT; SD; WY
[BONAP county map]
w North America
Discussion

Variety hylophilus occurs in the Rocky Mountains of western Wyoming and western Montana (and immediately adjoining Idaho), and the Black Hills of South Dakota.

Variety hylophilus is sympatric, in part, with vars. crispatus, miser, and tenuifolius. Its distinction may be preserved by ecological isolation; of the four varieties it is the most mesic, whereas the others are more xerophytic (D. Isely 1998).

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

Species 3 (3 in the flora).

Section Genistoidei consists of three species that are widespread through the Rocky Mountains and intermontane United States, from British Columbia and Alberta southward to Washington, Arizona, and South Dakota.

(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
Sibling taxa
A. miser var. crispatus, A. miser var. decumbens, A. miser var. miser, A. miser var. oblongifolius, A. miser var. praeteritus, A. miser var. serotinus, A. miser var. tenuifolius
Subordinate taxa
Synonyms Homalobus hylophilus Homalobus
Name authority (Rydberg) Barneby: Amer. Midl. Naturalist 55: 482. (1956) (Torrey & A. Gray) Barneby: Leafl. W. Bot. 5: 25. (1947)
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