OregonFlora: Astragalus beckwithii vs. Astragalus umbraticus

	Astragalus beckwithii	Astragalus umbraticus
	Weiser's milkvetch	Bald Mountain milkvetch, sylvan milkvetch
Habit		Plants perennial, caulescent, thinly villous, glabrate, hairs basifixed.
Stems		several, spreading to ascending, 20–50 cm.
Leaves		4–12 cm; leaflets 11–23, broadly oblong; ovate, or obovate to suborbicular, 4–20 × 2.5–8 mm; tips retuse or obtuse; surfaces glabrate to ciliate; stipules 3.5–9.5 mm; free.
Inflorescences		racemes loosely but shortly 10–25-flowered; peduncles 5–12 cm; bracts 1.7–4 mm; pedicels 0.6–1.2 mm; bracteoles 0.
Flowers		spreading to declined at anthesis; calyces 5.2–7 mm, thinly strigillose with dark hairs; tubes 3.1–4 mm; teeth subulate, 2.1–3.2 mm; corollas 10–14 mm, cream; greenish white, pale yellow, or ochroleucous, unspotted; ovules 10–15.
Fruits		bilocular, spreading or declined, lunately or falcately linear-lanceolate or linear, incurved to a half-circle, compressed triquetrous, 14–24 × 2.5–3.6 mm, glabrous; valves papery to thinly coriaceous; stipes 1–1.9 mm.

	Astragalus beckwithii	Astragalus umbraticus
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Oak and pine woodlands, ridges, burned areas. Flowering May–Jul. 400–1300 m. Casc, Sisk. Native. Endemic to Oregon. This species is endemic to southwestern Oregon.
Source		Flora of Oregon, volume 2, page 676 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. succumbens, A. tegetarioides, A. tetrapterus, A. toanus, A. tweedyi, A. tyghensis, 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: CA, OR Local Web sites: CalFlora, CalPhotos, 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 umbraticus

Weiser's milkvetch

Bald Mountain milkvetch, sylvan milkvetch

Habit

Plants perennial, caulescent, thinly villous, glabrate, hairs basifixed.

Stems

several, spreading to ascending, 20–50 cm.

Leaves

4–12 cm;

leaflets 11–23, broadly oblong; ovate, or obovate to suborbicular, 4–20 × 2.5–8 mm;

tips retuse or obtuse;

surfaces glabrate to ciliate;

stipules 3.5–9.5 mm; free.

Inflorescences

racemes loosely but shortly 10–25-flowered;

peduncles 5–12 cm;

bracts 1.7–4 mm;

pedicels 0.6–1.2 mm;

bracteoles 0.

Flowers

spreading to declined at anthesis;

calyces 5.2–7 mm, thinly strigillose with dark hairs;

tubes 3.1–4 mm;

teeth subulate, 2.1–3.2 mm;

corollas 10–14 mm, cream; greenish white, pale yellow, or ochroleucous, unspotted;

ovules 10–15.

Fruits

bilocular, spreading or declined, lunately or falcately linear-lanceolate or linear, incurved to a half-circle, compressed triquetrous, 14–24 × 2.5–3.6 mm, glabrous;

valves papery to thinly coriaceous;

stipes 1–1.9 mm.