Mojave Lupine

Annual, Herbs, Taproot present, Nodules present, Stems very short, acaulescent or subacaulescent, Stems less than 1 m tall, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules adnate to petiole, Leaves compound, Leaves palma tely 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, 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 ol ive, brown, or black, Seed surface mottled or patchy.

Lupinus odoratus is a species of lupine known by the common name Mojave lupine. It is native to the Mojave Desert and adjacent western Great Basin in the United States, where it grows in sandy or gravelly soils in open habitat.

It is an annual herb growing 10 to 30 centimeters tall. Each palmate leaf is made up of 7 to 9 green leaflets up to 2 centimeters long. The herbage is generally hairless except for new growth.

The inflorescence is an upright spiral of many flowers each up to a centimeter long. The flowers are royal purple-blue in color with a white spot on their banners, and have a scent similar to that of violets. The fruit is a thin legume pod up to 2 centimeters in length.