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Astragalus beckwithii

Weiser's milkvetch

pulse milkvetch

Habit Plants perennial, caulescent, strigillose, hairs basifixed.
Stems

several–numerous, prostrate to ascending or erect, 10–50 cm.

Leaves

2–9 cm;

leaflets (7)11–21(25), narrowly oblong to elliptic, linear, oblanceolate or obovate, 3–24(27) × 0.4–6 mm;

tips acute to obtuse, mucronate or emarginate;

surfaces abaxially strigose, adaxially glabrous;

stipules 1.5–8 mm; at least lowermost connate-sheathing.

Inflorescences

racemes loosely or remotely 3–23-flowered;

peduncles 0.2–4 cm;

bracts 0.5–3 mm;

pedicels 0.7–3.2 mm;

bracteoles 0–2.

Flowers

ascending at anthesis;

calyces 2.5–6 mm, strigillose with black, white, or a mixture of black and white hairs;

tubes 2–3 mm;

teeth subulate or linear, 0.7–3 mm;

corollas 6–9(11) mm, white to ochroleucous or pink-purple;

ovules 3–9.

Fruits

unilocular, pendulous, elliptic to oblong; straight or curved, laterally flattened, bicarinate, 7–17 × 2.5–4.5 mm, dark brown to black at maturity, usually glabrous or with few scattered white hairs;

valves papery;

stipes 1–7 mm.

2n

=24.

Astragalus beckwithii

Astragalus multiflorus

Distribution
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Discussion

Sagebrush communities. Flowering May–Aug. 1200–1800 m. BR. ID, NV; north to Yukon Territory, northeast to Manitoba, east to MN, southeast to CO. Native.

This widely distributed species has only recently been found in Malheur County; it is probably native.

Source Flora of Oregon, volume 2, page 669
Richard Halse
Sibling taxa
A. accidens, A. agrestis, A. alpinus, A. alvordensis, A. applegatei, A. arthuri, A. atratus, A. australis, A. californicus, A. calycosus, A. canadensis, A. caricinus, A. collinus, A. conjunctus, A. curvicarpus, A. cusickii, A. diaphanus, A. drummondii, A. eremiticus, A. filipes, A. gambellianus, A. geyeri, A. hoodianus, A. howellii, A. inflexus, A. iodanthus, A. kentrophyta, A. lemmonii, A. lentiginosus, A. malacus, A. misellus, A. mulfordiae, A. multiflorus, A. newberryi, A. nudisiliquus, A. obscurus, A. peckii, A. platytropis, A. purshii, A. reventus, A. robbinsii, A. salmonis, A. sclerocarpus, A. sheldonii, A. solitarius, A. spaldingii, A. sterilis, A. succumbens, A. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, A. umbraticus, A. vallaris, A. whitneyi
A. accidens, A. agrestis, A. alpinus, A. alvordensis, A. applegatei, A. arthuri, A. atratus, A. australis, A. beckwithii, A. californicus, A. calycosus, A. canadensis, A. caricinus, A. collinus, A. conjunctus, A. curvicarpus, A. cusickii, A. diaphanus, A. drummondii, A. eremiticus, A. filipes, A. gambellianus, A. geyeri, A. hoodianus, A. howellii, A. inflexus, A. iodanthus, A. kentrophyta, A. lemmonii, A. lentiginosus, A. malacus, A. misellus, A. mulfordiae, A. newberryi, A. nudisiliquus, A. obscurus, A. peckii, A. platytropis, A. purshii, A. reventus, A. robbinsii, A. salmonis, A. sclerocarpus, A. sheldonii, A. solitarius, A. spaldingii, A. sterilis, A. succumbens, A. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, A. umbraticus, A. vallaris, A. whitneyi
Subordinate taxa
A. beckwithii var. weiserensis
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