Part 2, 1920] FABACEAE: PSORALEAE 97 



119. Parosela enneandra (Nutt.) Britton, Mem. Torrey 

 Club 5: 196. 1894. 



Dalea enneandra Nutt.; Fraser, Cat. 1813. 



Dalea laxiflora Pursh. Fl. Am. Sept. 741. 1814. 



Psoralea laxiflora Poir. in Lam. Encyc. Suppl. 4: 590. 1816. 



Cylipogon virgatum Raf. Jour. Phys. 89: 97. 1819. 



Dalea penicillata Moric. PI. Nouv. Am. 66. 1S39. 



Pelalostemon laxiflorus Steud. Nom. Bot. ed. 2. 2: 308. 1841. 



A perennial, with a woody root; stems mostly single, 3-10 dm. high, glabrous, branched 

 above; leaves 2-3 cm. long; stipules subulate; rachis margined, glandular-dotted; leaflets 5-9, 

 linear or narrowly oblong, conspicuously glandular-dotted beneath, 5-12 mm. long, glabrous 

 and bluish-green; peduncles slender, 2-4 cm. long; spikes very lax, 5-12 cm. long; bracts 

 broadly ovate, short acuminate, densely glandular-dotted on the back, conspicuously scarious- 

 margined; calyx-tube turbinate, 3 mm. long, densely silky; lobes filiform with a triangular 

 base, 4 mm. long, beautifully plumose; corolla white; blade of the banner rounded-cordate, 

 glandular-dotted below, 3 mm. long, the claw 3 mm. long; wings inserted near the middle of 

 the staminate tube, the keel-petals higher up, the blades of the former 4 mm., those of the 

 latter 5 mm. long, the claws of both 1.5-2 mm. long; pod densely villous above, glabrous below. 



Type locality: On the Missouri River. 



Distribution: Iowa to North Dakota, New Mexico, Texas, and Mississippi. 



Illustrations: Moric. PI. Nouv. Am. pi. 45; Britt. & Brown, 111. Fl. /. 2104; ed. 2./. 2507. 



XXXI. Aureae. Sericeous perennial herbs, with a woody root and often with a short 

 wood}' caudex. Leaflets few, silky-canescent. Spikes dense, usually short, at the ends of 

 the stem and branches. Calyx-tube silky-pubescent, not strongly ribbed nor conspicuously 

 glandular. Corolla yellow, sometimes turning purple or red in age. Blade of the banner 

 suborbicular to cordate or reniform. Wings and keel-petals inserted near the middle of the 

 staminal tube, sometimes above, sometimes below it, the keel-petals longer than the wings, 

 and these than the banner. Pod pubescent, mostly silky. 



120. 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; 

 calyx- tube turbinate, nearly 3 mm. long, densely silky- villous; 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 keel- 

 petals 3 mm. long, the claws of both 1 mm. long; pod silky- villous. 



Type locality: San Miguelito Mountains, San Luis Potosi. 

 Distribution: San Luis Potosi to Puebla. 



121. Parosela Hallii (A. Gray) A. Heller, Bot. Expl. 

 Texas 49. 1895. 



Dalea Hallii A. Gray, Proc. Am. Acad. 8: 625. 1873. 



A herbaceous perennial, with a woody caudex; stems slender, decumbent, 1-2 dm. high, 

 strigose-canescent; leaves digitately ternate, 2-4 cm. long; stipules subulate, minute; petiole 

 1-1.5 cm. long, strigose; leaflets linear, acute or even minutely cuspidate, 1-2.5 cm. long, 

 glabrous above, strigose-canescent beneath, obsoktely glandular-dotted; peduncles terminal, 

 1-2 cm. long; spikes at first dense, in age laxer, 1-4 cm. long; bracts ovate-lanceolate, acuminate, 

 villous-canescent, equaling the calyx; calyx-tube turbinate, 2 mm. long, silky-canescent; lobes 



