OregonFlora: Astragalus beckwithii vs. Astragalus succumbens

	Astragalus beckwithii	Astragalus succumbens
	Weiser's milkvetch	Columbia milkvetch, crouching milkvetch
Habit		Plants perennial, caulescent, densely to thinly grayish hirsute, hairs basifixed.
Stems		several, decumbent to erect, 2–40(50) cm.
Leaves		3–10(11) cm; leaflets (7)9–19, oblong to oblong-ovate, obovate to elliptic, 5–19 × 3–9 mm; tips acute to obtuse or retuse; surfaces abaxially hirsute, adaxially hirsute to glabrescent; stipules (1.5)2.5–8(9) mm; free.
Inflorescences		racemes densely 10–25-flowered; peduncles 1.5–5.5 cm; bracts (2.5)4–12 mm; pedicels 0.5–2.3 mm; bracteoles 0–2.
Flowers		spreading-ascending at anthesis; calyces 9.5–13(15) mm; hirsute to hirsutulous with all white or white with some black hairs; tubes 7–8.6 mm; teeth subulate to linear-lanceolate, 2.5–5.5 mm; corollas 14–20(23) mm, bicolored; banners pink to white; wings white; keels pink to purple; tips spotted; ovules 27–38.
Fruits		bilocular, ascending, lunately linear-lanceolate or -oblong, arcuate to straight, triquetrous, strongly compressed, deeply sulcate dorsally; (20)25–40 × 4–8 mm, glabrous; valves cartilaginous; stipes 0.
2n		=24.

	Astragalus beckwithii	Astragalus succumbens
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Sandy hills and dunes, roadbanks, sagebrush. Flowering Apr–Jul. 50–900 m. Col. WA. Native.
Source		Flora of Oregon, volume 2, page 674 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. 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. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, A. umbraticus, A. vallaris, A. whitneyi
Subordinate taxa	A. beckwithii var. weiserensis
Web links	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: OR, WA Local Web sites: Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Astragalus beckwithii

Astragalus succumbens

Weiser's milkvetch

Columbia milkvetch, crouching milkvetch

Habit

Plants perennial, caulescent, densely to thinly grayish hirsute, hairs basifixed.

Stems

several, decumbent to erect, 2–40(50) cm.

Leaves

3–10(11) cm;

leaflets (7)9–19, oblong to oblong-ovate, obovate to elliptic, 5–19 × 3–9 mm;

tips acute to obtuse or retuse;

surfaces abaxially hirsute, adaxially hirsute to glabrescent;

stipules (1.5)2.5–8(9) mm; free.

Inflorescences

racemes densely 10–25-flowered;

peduncles 1.5–5.5 cm;

bracts (2.5)4–12 mm;

pedicels 0.5–2.3 mm;

bracteoles 0–2.

Flowers

spreading-ascending at anthesis;

calyces 9.5–13(15) mm; hirsute to hirsutulous with all white or white with some black hairs;

tubes 7–8.6 mm;

teeth subulate to linear-lanceolate, 2.5–5.5 mm;

corollas 14–20(23) mm, bicolored;

banners pink to white;

wings white;

keels pink to purple;

tips spotted;

ovules 27–38.

Fruits

bilocular, ascending, lunately linear-lanceolate or -oblong, arcuate to straight, triquetrous, strongly compressed, deeply sulcate dorsally; (20)25–40 × 4–8 mm, glabrous;

valves cartilaginous;

stipes 0.

=24.