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Howell's milkvetch

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

several, ascending to erect, forming bushy clumps, 5–40 cm.

Leaves

(4)5–14 cm;

leaflets (17)21–27(33), oblong, obovate-cuneate or oblanceolate, 4–14 × 1–4 mm;

tips obtuse to truncate-retuse;

surfaces pubescent, adaxially sometimes glabrate to glabrous;

stipules 3–5 mm; free.

Inflorescences

racemes loosely 10–25-flowered;

peduncles 5.5–18 cm;

bracts 1–2.5 mm;

pedicels 1–4.5 mm;

bracteoles 0.

Flowers

spreading or declined at anthesis;

calyces 5–8 mm, strigose or villosulous with white or sometimes black hairs;

tubes 4–5 mm;

teeth subulatetriangular, 1–3 mm;

corollas 6.5–8.5 mm, ochroleucous, unspotted;

ovules 11–21.

Fruits

bilocular, pendulous, lunately lanceolate or linear-lanceolate, trigonously compressed; (16)20–30 × 3–5 mm, densely villosulous;

valves stiffly papery;

stipes (4)7–12(14) mm.

Astragalus giganteus

Astragalus howellii

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

Scabland, dry rocky slopes and ridges, grassy hills. Flowering Apr–Jun. 50–1600 m. BW, Col. WA. Native.

Source Flora of Oregon, volume 2, page 665
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. 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. 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
Synonyms Astragalus howellii var. howellii
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