Bingen Lupine

Perennial, Herbs, Taproot present, Nodules present, Stems 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 gibbous, inflated, or spurred, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals orange or yellow, 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 bingenensis, common name bingen lupine or Suksdorf's lupine, is a plant species native to the US states of Washington, Idaho, Montana and Oregon as well as from British Columbia. Lupinus grows well in mountainous regions. The name honors the city of Bingen, in Klickitat County, Washington.

Lupinus bingenensis is a perennial herb up to 100 cm (40 inches)tall, most of the shoots covered with silky hairs. Each leaf has 9-15 leaflets, oblanceolate with pointed tips, both sides green though with whitish hairs on both sides. Flowers are blue to lavender, borne in racemes up to 20 cm (8 inches) long.

Several varietal names have been proposed, only two of which are widely recognized at present:

Lupinus bingenensis var. bingenensis

Lupinus bingenensis var. subsaccatus Suksd.