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crouching milk-vetch, sprawling milk-vetch
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Piper's milk-vetch
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Gray or greenish perennial from a woody taproot and crown, the erect stems tufted, 4-15 cm. long. |
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Leaves alternate, pinnate, 1-2 dm. long; leaflets 21-33, linear-oblong to narrowly oblanceolate, 4-21 mm. long, glabrous above; stipules 2.5-7 mm. long, papery, clasping but free. |
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Inflorescence of 10- to 20-flowered racemes, the peduncles stout, 14-30 cm. long, surpassing the leaves; pedicles ascending, 2-5 mm. long; flowers pale yellowish to greenish-white, drying yellowish; calyx 7-10 mm. long, with fine, black hairs, the 5 teeth 2-5 mm. long; banner 11.5-14 mm. long, recurved, the margins becoming lacerate, the wings longer than the banner; stamens 10. |
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Pod erect, sessile, oblong-ellipsoid, 1.5-2.5 cm. long and 6-10 mm. thick, with a rigid beak. |
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| April-June |
May-June |
| Sagebrush deserts, sandy barrens and lower foothills. |
Dry bluffs and canyon banks. |
Occurring east of the Cascades crest in Washington from Kittitas and Grant counties south; Washington to Umatilla and Gilliam Counties, Oregon.
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Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern WA east to adjacent Idaho.
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| Native |
Native |
| Not of concern |
Threatened in Washington (WANHP) |
A. agrestis, A. alpinus, A. arrectus, A. arthuri, A. arthurii, A. asotinensis, A. australis, A. beckwithii, A. canadensis, A. caricinus, A. cicer, A. collinus, A. columbianus, A. conjunctus, A. cusickii, A. diaphanus, A. eucosmus, A. falcatus, A. filipes, A. geyeri, A. hoodianus, A. howellii, A. inflexus, A. kentrophyta, A. laxmannii, A. leibergii, A. lentiginosus, A. lyallii, A. microcystis, A. misellus, A. miser, A. pulsiferae, A. purshii, A. reventiformis, A. reventus, A. riparius, A. robbinsii, A. sclerocarpus, A. sheldonii, A. sinuatus, A. spaldingii, A. speirocarpus, A. tenellus, A. tweedyi, A. whitneyi |
A. agrestis, A. alpinus, A. arrectus, A. arthuri, A. arthurii, A. asotinensis, A. australis, A. beckwithii, A. canadensis, A. caricinus, A. cicer, A. collinus, A. columbianus, A. conjunctus, A. cusickii, A. diaphanus, A. eucosmus, A. falcatus, A. filipes, A. geyeri, A. hoodianus, A. howellii, A. inflexus, A. kentrophyta, A. laxmannii, A. leibergii, A. lentiginosus, A. lyallii, A. microcystis, A. misellus, A. miser, A. pulsiferae, A. purshii, A. reventiformis, A. reventus, A. robbinsii, A. sclerocarpus, A. sheldonii, A. sinuatus, A. spaldingii, A. speirocarpus, A. succumbens, A. tenellus, A. tweedyi, A. whitneyi |
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OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
