80 NORTH AMERICAN FLORA [Volumr 24 



69. Parosela similis (Hemsl.) Rose, Contr. U. S. Nat. Herb. 12: 

 273. 1909. 



Dalea similis Hemsl. Diag. PI. Nov. 7. 1878. 



An erect robust annual; stem densely yellowish-canescent, not angled; leaves spreading, 

 3-5 cm. long; stipules minute, subulate; petiole very short; rachis densely tomentose; leaflets 

 21-41, subsespile, oblong-elliptic, 3-5 mm. long, acute, densely villous, the glands obscured 

 by the tomentum; peduncles terminal, 1-2 cm. long; spikes short and dense; bracts ovate- 

 lanceolate or lanceolate, densely villous, acuminate, longer than the calyx; calyx-tube turbi- 

 nate, silky-villous, 10-ribbed, 2.5 mm. long; lobes subulate, longer than the tube; corolla white; 

 blade of the banner orbicular, 3 mm. long, shorter than the claw; blades of the other petals 

 oblong-elliptic, with a rounded basal lobe and short claw; pod villous above. 



Type locality: Cerro de Pinal, Durango. 

 Distribution: Durango. 



XVI. Citriodorae. Slender, glabrous annuals, often branched from the base. Leaflets 

 many, small, oblong to oval. Spikes dense and short; bracts more persistent, glabrous, 

 obovate or ovate or orbicular, abruptly short- acuminate, glandular-dotted, more or less colored, 

 scarious-margined, concave. Calyx-tube campanulate, moderately strongly 10-ribbed; 

 lobes short, from half to fully as long as the tube. Corolla purple. Blade of the banner 

 rhombic-ovate to rhombic-cordate. Wings and keel-petals inserted at or near the middle of 

 the staminal tube, the blades obliquely obovate, the claws short. Pod pubescent, at least 

 above. 



70. Parosela citriodora (Cav.) Rose, Contr. U. S. Nat. Herb. 

 10: 104. 1906. 



Psoralea citriodora Cav. Ic. 3: 36. 1794. 



Dalea citriodora Willd, Sp. PI. 3: 1339. 1803. 



Dalea lateripes Moc. & Sesse; DC. Prodr. 2: 245. as synonym. 1825. 



An annual; stem often branched from the base, 1-4 dm. high, glabrous; leaves 1.5-3 cm. 

 long; stipules setaceous, 3 mm. long; petiole very short; rachis slender, glabrous, with gland- 

 like stipels; leaflets 13-23, oblong, obtuse or glandular-apiculate, 3-5 mm. long, glabrous, 

 glandless or with a few minute glands along the margin towards the apex; peduncles terminal, 

 1-5 cm. long; spikes dense, 1-2 cm. long, 6-8 mm. thick; bracts rounded-obovate, abruptly 

 short acuminate, slightly purple-tinged, with 2 inconspicuous glands; calyx-tube turbinate, 

 more or less silky, 2-2.5 mm. long, 10-ribbed; lobes slightly unequal, triangular, less than half 

 as long as the tube, acute; corolla bluish-purple; blade of banner rhombic-ovate, nearly 2 mm. 

 long, equaling the claw; blades of the wings a little more than 2 mm. long, those of the keel- 

 petals broader, with a smaller basal lobe, the claws of both 1 mm. long; pod broadly obliquely 

 obovate, almost 3-angular in outline, minutely puberulent above. 



Type locality: Mexico. 



Distribution: Durango and San Luis Potosi to Oaxaca and Guatemala. 



Illustration: Cav. Ic. pi. 271. 



71. Parosela polyphylla (Mart. & Gal.) Rose, Contr. U. S. Nat. 

 Herb. 10: 104. 1906. 



Dalea polyphylla Mart. & Gal. Bull. Acad. Brux. 10 2 : 44. 1843. 



Dalea citriodora H. & A.; Hemsl. Biol. Centr. Am. Bot. 1: 245. 1880. Not D. citriodora Willd. 



1803. 

 ? Dalea platyslegia S. Schauer, Linnaea 20: 741. 1847. 



An annual or perennial, more or less suffruticose below, branched above; stem glabrous, 

 purplish, sparingly and inconspicuously glandular-dotted; leaves ascending, 3-5 cm. long; 

 stipules subulate, 4-5 mm. long; petiole 2-5 mm. long; rachis glabrous; stipels conspicuous, 

 gland-like; leaflets 11-41, oblong, 3-6 mm. long, glabrous, glandular-dotted beneath; peduncles 

 terminating the branches or some of them sub-opposite the leaves, 3-10 cm. long; spikes ob- 

 long, dense, 1-3 cm. long; bracts suborbicular, abruptly acuminate, glabrous, conspicuously 

 glandular-dotted, caducous; calyx silky-villous; tube campanulate, 10-ribbed, 2-2.5 mm. long; 



