OregonFlora: Astragalus villosus vs. Astragalus accidens

	Astragalus villosus	Astragalus accidens
		Rogue River milkvetch
Habit		Plants perennial, caulescent, thinly villosulous, hairs basifixed.
Stems		several–numerous, decumbent to ascending, 30–55 cm, basally leafless.
Leaves		(3)5–12 cm; leaflets (15)19–29; lance-oblong, oblong to oblong-elliptic, 6–22 × 3–9 mm; tips emarginate or retuse; surfaces abaxially pubescent, adaxially pubescent or glabrous; stipules 3–6 mm; free.
Inflorescences		racemes, 7–15-flowered; peduncles (4.5)7–15 cm; bracts 1.5–3.3 mm; pedicels 1.5–3.3 mm; bracteoles (0)2.
Flowers		horizontal or somewhat declined at anthesis; calyces 6–9.4 mm, villosulous with black, fuscous or white hairs; tubes 4.0–5.5 mm; teeth subulate, 1.7–4 mm; corollas 13.8–19.3 mm; whitish to greenish yellow or yellowish, drying ochroleucous; ovules 11–24.
Fruits		bilocular, pendulous, rarely humistrate, oblong-ovoid or half-ovoid, subterete, becoming ± laterally compressed and bicarinate, 10–25 × 4.5–12 mm, glabrous or loosely strigillose; valves subligneous; stipes 5–12 mm.

	Astragalus villosus	Astragalus accidens
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		California and Oregon. 2 varieties.
Source		Flora of Oregon, volume 2, page 656 Richard Halse
Sibling taxa	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. succumbens, A. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, A. umbraticus, A. vallaris, A. whitneyi	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. succumbens, A. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, A. umbraticus, A. vallaris, A. whitneyi
Subordinate taxa		A. accidens var. accidens, A. accidens var. hendersonii
Web links	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 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 villosus

Astragalus accidens

Rogue River milkvetch

Habit

Plants perennial, caulescent, thinly villosulous, hairs basifixed.

Stems

several–numerous, decumbent to ascending, 30–55 cm, basally leafless.

Leaves

(3)5–12 cm;

leaflets (15)19–29; lance-oblong, oblong to oblong-elliptic, 6–22 × 3–9 mm;

tips emarginate or retuse;

surfaces abaxially pubescent, adaxially pubescent or glabrous;

stipules 3–6 mm; free.

Inflorescences

racemes, 7–15-flowered;

peduncles (4.5)7–15 cm;

bracts 1.5–3.3 mm;

pedicels 1.5–3.3 mm;

bracteoles (0)2.

Flowers

horizontal or somewhat declined at anthesis;

calyces 6–9.4 mm, villosulous with black, fuscous or white hairs;

tubes 4.0–5.5 mm;

teeth subulate, 1.7–4 mm;

corollas 13.8–19.3 mm; whitish to greenish yellow or yellowish, drying ochroleucous;

ovules 11–24.

Fruits

bilocular, pendulous, rarely humistrate, oblong-ovoid or half-ovoid, subterete, becoming ± laterally compressed and bicarinate, 10–25 × 4.5–12 mm, glabrous or loosely strigillose;

valves subligneous;

stipes 5–12 mm.