San Jacinto Lupine

Perennial, Herbs, Taproot present, Nodules present, Stem s erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules adnate to petiole, Leaves compound, Leaves palmately 5-11 foliate, Leaf or leaflet margins entire, Leaflets 5-9, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence terminal, Bracts conspicuously present, Bracts very small, absent or caducous, Bracteoles present, Flowers zygomorphic, Calyx 5-lobed, Calyx 2-lipped or 2-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals blue, lavander to purple, or violet, Petals bicolored or with red, purple or yellow streaks or spots, Banner petal ovoid or obovate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auriculate, spurred, or gibbous, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens monadelphous, united below, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit internally septate between the seeds, Fruit hairy, Fruit 3-10 seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black, Seed surface mottled or patchy.

Lupinus hyacinthinus is a species of lupine known by the common name San Jacinto lupine. It is native to the mountains of southern California and adjacent Baja California, where it grows in dry areas, often in pine forests. It is a perennial herb growing erect to a maximum height of one meter. It is hairy in texture, its newer herbage gray-green in color. Each palmate leaf is divided into up to 12 narrow leaflets up to 8 centimeters long and a few millimeters wide. The inflorescence bears whorls of flowers each over one centimeter long. The flower is purple or blue with a white to yellow patch on its banner. The fruit is a silky-haired legume pod 3 or 4 centimeters long containing speckled seeds.