Psoralidium junceum (Eastw.) Rydb.

Psoralidium junceum (Eastw.) Rydberg
Psoralea juncea Eastw. Proc. Calif. Acad. II. 6: 286. 1897.
A perennial, with a rootstock, tufted; stem 6-10 dm. high, with numerous nearly erect virgate branches, sparingly strigose or nearly glabrous, sparingly glandular-dotted, striate; lower leaves digitately 3-5-foliolate; petioles 5-7 cm. long; leaflets oblanceolate, acute at both ends or acuminate at the apex, 3-4 cm. long, those of the stem and branches reduced to small subulate scales, 3-4 mm. long, glandular-dotted and strigose; peduncles 1-1.5 dm. long; racemes 1-3 cm. long, few-flowered; flowers 1 or 2 at each node; bracts minute, ovate, acuminate; pedicels about 1 mm. long; calyx canescent-strigose, 2 mm. long; teeth nearly equal, rounded at the apex; corolla dark-blue, 5 mm. long; banner suborbicular, emarginate; pod ovoid, with a short erect beak, densely silky.
Type locality: Epsom Creek, Southeastern Utah. Distribution: Southern Utah.

Perennial, Shrubs, Herbs, Plants with rhizomes or suckers, Taproot present, Nodules present, Stems erect or ascending, 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 absent at flowering time, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules free, Leaves compound, Leaves palmately 2-3 foliate, Leaf or leaflet margins entire, Leaflets 1, Leaflets 3, Leaves glandul ar punctate or gland-dotted, Leaves hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals blue, lavander to purple, or violet, Banner petal suborbicular, broadly rounded, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit indehiscent, Fruit orbicular to subglobose, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit beaked, Fruit hairy, Fruit 1-seeded, Seeds reniform, Seed surface smooth, Seeds olive, brown, or black.

Psoralidium junceum is a species of flowering plant in the legume family, commonly known as rush lemonweed, or rush scurfpea. It is native to southwestern North America where it is only known from Arizona and Utah. It grows on sand dunes, among shrubs on semi-stabilized sands, on mudflats encrusted with salt and on bare rocky slopes.

Psoralidium junceum là một loài thực vật có hoa trong họ Đậu. Loài này được (Eastw.) Rydb. miêu tả khoa học đầu tiên.