Parosela luisana

Parosela luisana (S. Wats.) Vail, Bull. Torrey Club 24: 16. 1896.
Dalea luisana S. Wats. Proc. Am. Acad. 17: 341. 1882. Dalea lernala Brand. Univ. Calif. Publ. Bot. 3: 380. 1909.
A herbaceous perennial, with a woody caudex; stems several, ascending or decumbent, 5-15 cm. high, strigose-canescent ; leaves 2-4 cm. long; stipules setaceous, 3 mm. long; petiole about 1 cm. long; rachis and petiole strigose-canescent; leaflets 3, linear or linear-oblanceolate, 1-2 cm. long, acute, glabrate above, silky-strigose beneath, the terminal one longer than the other two and on a short rachis; peduncles terminal, very short; spikes dense, 1-2 dm. long, about 1 cm. thick; bracts greenish, ovate to lanceolate, silky, acuminate, equaling the calyx; calyxtube turbinate, nearly 3 mm. long, densely silkyvillous; lobes filiform from a triangular base, plumose, longer than the tube; corolla yellow; blade of the banner suborbicular, 1.5 mm. long, 2 mm. broad, the claw 2 mm. long; blades of the wings 2 mm. long, those of the keelpetals 3 mm. long, the claws of both 1 mm. long; pod silkyvillous.
Type locality: San Miguelito Mountains, San Luis Potosi. Distribution: San Luis Potosi to Puebla.