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basalt milk-vetch

Habit Greenish perennial from a taproot and branched crown, the numerous, erect, slender stems 3-9 dm. tall.
Leaves

Leaves alternate, pinnate, 5-10 cm. long;

leaflets 9-25, linear-oblanceolate, 7-20 mm. long and 1-2 mm. wide;

stipules triangular, 1-3 mm. long, united below and free above.

Flowers

Inflorescence of laxly 10- to 30-flowered racemes on peduncles up to 2 dm. long, exceeding the leaves; pedicles slender, 2-6 mm. long;

flowers pea-like, cream colored, 9-13 mm. long, spreading to pendant;

calyx blackish, 4-6 mm. long, the 5 teeth under 1 mm. long;

banner erect;

wings rounded, shorter than the banner but 1-4 mm. longer than the slightly beaked keel;

stamens 10.

Fruits

Pod spreading to pendulous, with a slender stipe 10-15 mm. long, the body membranous, greenish, usually glabrous, linear to oblong-elliptic in outline, 15-35 mm. long and 4-6 mm. wide, strongly compressed, elliptic in cross section, 1-celled.

Astragalus giganteus

Astragalus filipes

Flowering time May-June
Habitat Sagebrush plains and lower foothills.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in Washington; British Columbia to northeast California, east to Nevada and Idaho.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
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. 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. 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. tweedyi, A. whitneyi
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