Hoita orbicularis (Lindl.) Rydb.

Hoita orbicularis (L,indl.) Rydberg
Psoralea orbicularis Lindl. Bot. Reg. 23: pi. 1971. 1837. Lotodes orbiculare Kuntze, Rev. Gen. 194. 1891.
A perennial; stem prostrate and creeping, glabrous or strigose; leaves 3-foliolate; stipules ovate, about 1 cm. long; petioles 1-5 dm. long, conspicuously punctate, glabrous or somewhat short-pubescent; leaflets orbicular or rounded-obovate, 3-8 cm. long, 3-7 cm. wide glabrous to cinereous-puberulent; peduncles erect, 2-6 dm. long; racemes 5-30 cm. long, dense; bracts oblong-lanceolate, scarious, 1-2 cm. long, conspicuously glandular and ciliate; calyx densely villous and glandular, unequally cleft; tube 4-5 mm. long; lobes linear-lanceolate, acuminate, the lowest one about 15 mm. long, the rest about 10 mm. long; corolla reddish-purple, 15 mm. long; banner broadly obovate, with a short claw; blades of the wings oblong-oblanceolate, 12 mm. long, with a rounded basal lobe, those of the keel-petals 10 mm. long, obliquely _lunate obtuse. L claws of both 4 mm. long; tenth filament free to near the base, pod about 8 mm. long, hirsute, with a veryismall straight beak; seed elliptic, light-brown.
Type locality: California.
S=! Bof Ret 23: * 1971; Lounsberry, Guide Wild Fl. * 61.

Perennial, Herbs, Taproot present, Nodules present, Plants stoloniferous, Stems prostrate, trailing, or mat forming, Stems less than 1 m tall, Plants gland-dotted or with gland-tipped hairs, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules deciduous, Stipules free, Leaves compound, Leaves pinnately 3-foliolate, Leaves odd pinnate, Leaflets opposite, Leaflets 3, Leaves glabrous or nearly so, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx glan d-dotted or with glandular spot, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals blue, lavander to purple, or violet, Banner petal ovoid or obovate, Banner petal auriculate, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Wing tips obtuse or rounded, Keel tips obtuse or rounded, not beaked, Keel petals fused on sides or at tip, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens monadelphous, united below, Filaments glabrous, Style terete, Style sharply bent, Style with distal tuft of hairs, Fruit a legume, Fruit unilocular, Fruit indehiscent, Fruit oblong or ellipsoidal, Fruit enclosed in calyx, Fruit beaked, Fruit hairy, Fruit 1-seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

Hoita orbicularis is a species of legume known by the common name roundleaf leather-root. It is endemic to California, where it is relatively widespread throughout the state's mountain ranges, growing most often in moist habitat. It is a perennial herb growing prostrate or nearly so at ground level with large leaves each made up of three round leaflets up to 11 centimetres (4+1⁄4 in) long each. The herbage is glandular and often hairy. The inflorescence is an erect raceme which may be up to 35 centimetres (13+2⁄3 in) long. Each of the many flowers is one or two centimeters long, pealike, and generally a shade of light to medium purple in color. The fruit is a hairy, veiny legume pod just under 1 centimetre (1⁄2 in) long.

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