Astragalus hoodianus Howell

Cnemidophacos knowlesianus Rydberg, sp. nov
A perennial, with a woody cespitose caudex; stem 1-2 dm. high, angled and somewhat sulcate, sparingly pubescent; leaves 5-10 cm. long, erect; stipules deltoid, 3 mm. long, somewhat connate; leaflets 25-33, linear-oblong, 5-10 mm. long, 2-3 mm. wide, canescent on both sides, obtuse; peduncles erect, 1.5-2 dm. long, black-hairy above; raceme in anthesis 3-5 cm. long, in fruit 5-10 cm. long; bracts lance-subulate, 3-4 mm. long, black-hairy; calyx blackhairy with loose hairs, the tube 5 mm. long, 3 mm. broad, the teeth subulate, 4 mm. long; corolla apparently white, 18-19 mm. long; banner narrowly obovate, moderately arcuate; wings nearly as long, the blades obliquely oblanceolate, with a large basal auricle; keel-petals shorter, the blade broadly lunate, obtuse; pod erect, obliquely ovoid, short-pubescent, wrinkled, 1.5-2 cm. long, 7-8 mm. thick, upper suture prominent, transversely oval in cross-section.
Type collected on mountain sides, western Klickitat County, Washington, April 23 and in June 18S6, Suksdorf 482 (herb. Columbia Univ.). Distribution: Washington and Oregon.

Cnemidophacos hoodianus (Howell) Rydberg
Astragalus hoodianus Howell, Erythea 1: 111. 1893.
Astragalus conjunctus Hoodianus M. E. Jones, Contr. W. Bot. 8: 9. 1898.
Phaca hoodiana Piper. Contr. U. S. Nat. Herb. 11: 373. 1906.
A perennial, with a woody cespitose caudcx; stems 1-2 dm. high, sulcate and angled, more or less canescent-pubescent ; leaves erect, 10-12 cm. long, the rachis villous with ascending hairs; stipules deltoid, connate, 5 mm. long; leaflets 21-31, linear or oblong, S— 18 mm. long, canescent on both sides, obtuse or acute; peduncles erect, 1.5-2.5 dm. long; racemes rather dense, 5-S cm. long; bracts subulate, 3-5 mm. long; pedicels 1-2 mm. long; calyx white-villous, the tube 5 mm. long, 3 mm. broad, the teeth subulate, 5 mm. long; corolla white, about 2 cm. long; banner narrowly obovate, moderately arcuate; wings shorter, the blade obliquely oblong, falcate, with a large basal auricle; keel-petals much shorter, the blade broadly lunate, rounded at the apex; pod erect, rather long-hairy, about 18 mm. long, 6-7 mm. thick, oval in cross-section, the upper suture prominent.
Type locality: Hood River, Oregon.
Distribution: Columbia Valley. Oregon and Washington.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems very short, acaulescent or subacaulescent, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stem hairs hispid to villous, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules membranous or chartaceous, Stipules persistent, Stipules connate to each other, forming a tuber or sheath, Leaves compound, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 10-many, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomo rphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals ochroleucous, cream colored, Banner petal narrow or oblanceolate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auriculate, spurred, or gibbous, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in fruit, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit rugose wrinkled or reticulate, Fruit or valves persistent on stem, Fruit fleshy, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit hairy, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.

Astragalus hoodianus adalah spesies tumbuhan yang tergolong ke dalam famili Fabaceae. Spesies ini juga merupakan bagian dari ordo Fabales. Spesies Astragalus hoodianus sendiri merupakan bagian dari genus Astragalus. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Howell.

Astragalus hoodianus là một loài thực vật có hoa trong họ Đậu. Loài này được Howell miêu tả khoa học đầu tiên.