Klamath Basin Milkvetch

Homalobus californicus (A. Gray) A. Heller, Muhlenbergia 2:86. 1905.
, Astragalus collinus californicus A. Gray. Proc. Am. Acad. 12: 54. 1876. Astragalus californicus Greene, Bull. Calif. Acad. 1: 157. 1885.
A perennial, with a cespitose caudex; stems 3-6 dm. high, pilose, striate, branched; leaves 3-9 cm. long; stipules lanceolate, 3-4 mm. long; leaflets oblong, 5-20 mm. long, 2-6 mm. wide, pilose on both sides or glabrate above, obtuse to retuse at the apex; peduncles 6-8 mm. long; racemes 3-6 cm. long; bracts lanceolate, 3 mm. long, longer than the pedicels; calyx villous with mixed dark and light hairs, the tube 4-5 mm. long, 3-4 mm. broad, gibbous below on the upper side, the upper two teeth deltoid, the lower three subulate, 1 mm. long; corolla ochroleucous, 12 mm. long, similar to that of H. collinus; pod villous-pilose, stipitate, the stipe 12 mm. long, the body 2.5-3 cm. long, 4 mm. wide, nearly straight, often mottled with brown.
Type locality: Yreka, California.
Distribution: Northern California.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems less than 1 m tall, Stems solid, Stems or young twig s 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 zygomorphic, 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, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in fruit, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit or valves persistent on stem, 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 californicus is a species of milkvetch known by the common name Klamath Basin milkvetch.

It is native to the Klamath Mountains and surrounding High Cascade Ranges of northern California and southern Oregon, where it grows in scrub and woodland habitat.