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crouching milk-vetch, sprawling milk-vetch
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Tweedy's milk-vetch
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Grayish-puberulent perennial from a taproot, the several erect stems 2-6 dm. tall. |
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Leaves alternate, pinnate, 4-10 cm. long; leaflets 13-21, linear to narrowly oblong, 8-22 mm. long and 1-2 mm. wide; stipules lanceolate, 2-5 mm. long. |
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Inflorescence of closely 10- to 50-flowered racemes, the peduncles up to 15 cm. long, exceeding the leaves; flowers white to pale yellow, spreading or ascending, 15-18 mm. long; calyx 7-9 mm. long, puberulent, slightly gibbous at base, the 5 teeth 1-2 mm. long; wings acute, 1-2 mm. longer than the rounded keel; stamens 10. |
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Pod erect, glabrous, with a stipe half again as long as the calyx, the body leathery, 15 mm. long and 4-5 mm. wide, terete in cross section, 1-celled, acute at each end. |
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| April-June |
May-June |
| Sagebrush deserts, sandy barrens and lower foothills. |
Sagebrush plains and foothills. |
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 Washington, from Yakima County south; central Washingtonto north-central Oregon near the Columbia River and lower Deschutes River.
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| Native |
Native |
| Not of concern |
Not of concern |
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. riparius, A. robbinsii, A. sclerocarpus, A. sheldonii, A. sinuatus, A. spaldingii, A. speirocarpus, A. succumbens, A. tenellus, A. whitneyi |
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OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
