Part 2, 1920] FABACEAE: PSORALEAE 83 



boat-shaped and enclosing the flowers, veiny, truncate, abruptly contracted into a filiform 

 acumination about equaling the body; calyx-tube broadly campanulate, membranous, with 

 10 dark veins, 2 mm. long, glabrous; lobes triangular, less than half as long as the tube; banner 

 ochroleucous, tinged with violet, the blade cordate, 5 mm. long, the claw 4 mm. long; blades 

 of the wings 4 mm. long, those of the keel-petals with a smaller basal lobe, 5 mm. long, the 

 claws of both 2 mm. long; pod glabrous. 



Type locality: Mexico, probably in Veracruz. 

 Distribution: Central Mexico. 



79. Parosela bicolor (Willd.) Rydberg. 



Dalea bicolor Willd. Hort. Berol. pi. 89. 1809. 



? Dalea Coronilla G. Don, Gen. Hist. 2: 226. 1832. 



A perennial, woody at the base; stems several, decumbent or ascending, terete, more 

 or less pilose; leaves 3-4 cm. long; stipules setaceous-subulate, about 4 mm. long; rachis spar- 

 ingly pilose and slightly glandular-dotted; stipels obsolete; leaflets 7-9, obovate, or cuneate, 

 emarginate or truncate at the apex, usually 4-7 mm. long, sometimes 7-15 mm., glabrous 

 above, glandular-dotted and usually sparingly pilose beneath; peduncles terminating the 

 branches, 2-5 cm. long, pilose; spikes dense, 3-6 cm. long, about 1 cm. thick; bracts persistent, 

 membranous, somewhat boat-shaped, broad, glandular-punctate, enclosing the flowers, 

 tuncate at the apex, abruptly contracted into a filiform, ciliate acumination, which is about 

 half as long as the body; calyx-tube campanulate, glabrous or slightly pilose, minutely glandu- 

 lar-dotted, with 10 dark veins, 3 mm. long; lobes triangular, one-fourth to one-third as long as 

 the tube; banner ochroleucous, the blade round-ovate, 3 mm. long, equaling the claw; wings 

 and keel ochroleucous below, with violet tips; blades of the wings elliptic, with a large basal 

 lobe, 4 mm. long, those of the keel-petals broadly obliquely obovate, with a smaller basal 

 lobe, 4.5 mm. long, the claws of both about 1 mm. long; pod pilose towards the summit. 



Type locality: Tropical America. 



Distribution: States of Mexico and Puehla. 



Illustrations: Willd. Hort. Berol. pi. 89; Hook. Exot. Fl. pi. 43. 



SO. Parosela mutabilis Cav. Descr. PI. 186. 1802. 



Psoralea mutabilis Cav. Ic. 4: 65. 1797. 



Dalea obovalifolia Ortega, Dec. 32. 1797. 



Dalea mutabilis Willd. Sp. PI. 3: 1339. 1803. 



Dalea unguicularis Moc. & Sesse; DC. Prodr. 2: 245, as a synonym. 1825. 



A herbaceous perennial, with a thick root and short caudex, rarely suffrutescent; stems 

 decumbent, 2-5 dm. long, glabrous or sparingly pubescent above; leaves spreading, 2-3 cm. 

 long; stipules subulate, 2-3 mm. long; petiole about 1 cm. long; rachis glabrous or nearly so; 

 stipels gland-like; leaflets 7-17, obovate, truncate or slightly emarginate, 5-8 mm. long, gla- 

 brous on both sides, glaucous and glandular-punctate beneath; peduncles terminating the 

 branches, sparingly villous, 1-3 cm. long; spikes elongate but rather dense, 3-10 cm. long; 

 bracts obovate, boat-shaped, truncate or emarginate at the apex, abruptly contracted into a 

 filiform tip, rather persistent; calyx-tube sparingly silky-villous, campanulate, terete, with 

 strong dark veins, 4 mm. long; lobes broadly deltoid, ciliolate on the margins, one-fourth 

 as long as the tube; banner yellow, the blade rounded-obovate, 4 mm. long, equaling the claw; 

 wings and keel yellowish with purple spots; blades of the former 6 mm. long, those of the keel- 

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

 silky-villous on the top. 



Type locality: Cultivated in the Royal Garden at Madrid; said to come from Cuba and Mex- 

 ico, probably the latter. 



Distribution: San Luis Potosl to Puebla. 



Illustrations: Cav. Ic. pi. 394; Bot. Mag. pi. 2486; Bonpl. Jard. Malm. pi. 57. 



XVIII. Capitatae. Low shrubs with divaricate branches. Leaflets rather few, small 

 and crowded. Spikes short and head-like, few-flowered. Bracts broadly ovate, subper- 

 sistent, copiously glandular-dotted. Calyx-tube campanulate, pubescent, not strongly ribbed, 

 glandular-dotted; lobes triangular, shorter than the tube. Corolla yellow. Blade of the 



