OregonFlora: Astragalus beckwithii vs. Astragalus sclerocarpus

	Astragalus beckwithii	Astragalus sclerocarpus
	Weiser's milkvetch	The Dalles milkvetch
Habit		Plants perennial, caulescent, silvery strigillose, hairs basifixed.
Stems		several, spreading or decumbent to ascending; clump-forming, 20–50 cm.
Leaves		(3)5–13 cm; leaflets (5)7–17(21), linear, linear-oblanceolate or narrowly oblong, 3–23 × 1–4 mm; tips obtuse or retuse; surfaces abaxially pubescent, adaxially pubescent, glabrescent, or glabrous; stipules 1.5–5 mm; free.
Inflorescences		racemes loosely (3)7–21(30)-flowered; peduncles 4–9.5 cm; bracts 1–2 mm; pedicels 1–2.5 mm; bracteoles usually 2.
Flowers		spreading-ascending at anthesis; calyces 5.9–8 mm, finely strigillose with black or largely black hairs; tubes 5.3–7 mm; teeth triangular, 0.5–1.3 mm; corollas 13–16 mm; whitish; banners and wings lilac-tinged; keels spotted with purple; ovules 30–36.
Fruits		unilocular, pendulous, crescentic or falcate, laterally compressed, sigmoidally incurved distally, bicarinate, 20–35 × (5.5)6.5–9 mm, densely to thinly strigillose; valves stiffly coriaceous or subligneous; stipes 12–20 mm.

	Astragalus beckwithii	Astragalus sclerocarpus
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Sandy barrens, dunes, roadsides, sagebrush. Flowering Apr–Jun. 50–900 m. Col. WA; north to British Columbia. Native.
Source		Flora of Oregon, volume 2, page 673 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. 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
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: 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

Astragalus beckwithii

Astragalus sclerocarpus

Weiser's milkvetch

The Dalles milkvetch

Habit

Plants perennial, caulescent, silvery strigillose, hairs basifixed.

Stems

several, spreading or decumbent to ascending; clump-forming, 20–50 cm.

Leaves

(3)5–13 cm;

leaflets (5)7–17(21), linear, linear-oblanceolate or narrowly oblong, 3–23 × 1–4 mm;

tips obtuse or retuse;

surfaces abaxially pubescent, adaxially pubescent, glabrescent, or glabrous;

stipules 1.5–5 mm; free.

Inflorescences

racemes loosely (3)7–21(30)-flowered;

peduncles 4–9.5 cm;

bracts 1–2 mm;

pedicels 1–2.5 mm;

bracteoles usually 2.

Flowers

spreading-ascending at anthesis;

calyces 5.9–8 mm, finely strigillose with black or largely black hairs;

tubes 5.3–7 mm;

teeth triangular, 0.5–1.3 mm;

corollas 13–16 mm; whitish;

banners and wings lilac-tinged;

keels spotted with purple;

ovules 30–36.

Fruits

unilocular, pendulous, crescentic or falcate, laterally compressed, sigmoidally incurved distally, bicarinate, 20–35 × (5.5)6.5–9 mm, densely to thinly strigillose;

valves stiffly coriaceous or subligneous;

stipes 12–20 mm.