78 NORTH AMERICAN FLORA [Volume; 24 



wings obliquely oblong, with a rounded basal lobe, the claws very short; blades of the keel- 

 petals obliquely obovate, with an obsolete basal lobe, 2 mm. long, the claws 1 mm. long; pod 

 pilose above, glabrate below. 



Type collected at Haciendas de Zent et de Guacimo, Costa Rica, United Fruit Company 21 

 (U. S.Nat. Herb. no. 861459). 



Distribution: Costa Rica. 



64. Parosela leporina (Ait.) Rydberg. 



Psoralen leporina Ait. Hort. Kew. 3: 81. 1789. 



Dalea alopecuroides Hemsl. Biol. Centr. Am. Bot. 1 : 237. 1880. Not D. alopecuroides Willd. 1803. 



Dalea annua alopecuroides Kuntze. Rev. Gen. 178, in part. 1891. 



Dalea annua ebracieata Kuntze, Rev. Gen. 178. 1891. 



A tall, branched annual; stem striate, glabrous, sparingly glandular-dotted, 5-10 dm. 

 high; branches ascending; leaflets ascending, 5-10 cm. long; stipules subulate, 2-3 mm. long; 

 petiole 5-10 mm. long; rachis margined, glabrous, sparingly dotted; stipels gland-like; leaflets 

 21-35, oblong, 5-10 mm. long, rounded or retuse at the apex, glabrous on both sides, paler and 

 glandular-dotted beneath; peduncles terminal at the ends of the branches and opposite the 

 leaves, 5-15 cm. long; spikes dense, cylindric, 2-5 cm. long, 8-10 mm. thick; bracts ovate or 

 lanceolate, acuminate, membranous, early deciduous, longer than the buds, silky-pilose or 

 puberulent below and ciliate on the margin, the upper part glabrous and dark on the back; 

 calyx-tube turbinate, silky-pilose, 2-2.5 mm. long; lobes subulate-setaceous, with a broader 

 base, about equaling the tube; corolla blue with whitish base or rarely white; blade of the 

 banner rounded-subcordate, truncate at the base, 2-2.5 mm. long, the claw 2 mm. long; blades 

 of the wings and keel-petals with rather indistinct basal lobes, 2 mm. long, the claws 1 mm. 

 long; pod silky-pilose. 



Type locality: Cultivated plant of unknown origin [probably Mexico], 

 Distribution: New Mexico and Arizona to Guatemala; perhaps further south. 



65. Parosela alopecuroides (Willd.) Rydberg. 



? Dalea alba Michx.; Roem. Cat. Hort. Turic. 1802. 



Dalea alopecuroides Willd. Sp. PI. 3: 1336. 1803. 



Dalea Linnaei Michx. Fl. Bor. Am. 2: 57, in part. 1803. 



Psoralea alopecuroides Poir. in Lam. Encyc. 5: 695. 1804. 



Petalostemon alopecuroides Pers. Syn. PI. 2: 268. 1807. 



Petalostemon alopecuroideum Pursh. Fl. Am. Sept. 461. 1814. 



Dalea Cliffortiana Pursh, Fl. Am. Sept. 474, in part. 1814. Not D. Cliffortiana Willd. 1803. 



Dalea pedunculata Pursh, Fl. Am. Sept. 474. 1814. 



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



Dalea Dalea McMill. Metasp. Minn. Valley 330, in part. 1892. Not Psoralea Dalea L. 1753. 



Parosela Dalea Britton, Mem. Torrey Club 5: 196, in part. 1894. 



An annual; stem striate, glabrous, glandular-dotted, somewhat tubercled, with ascending 

 branches, 3-10 dm. high; leaves ascending, 4—8 cm. long; stipules subulate, 2-3 mm. long; 

 petiole 5-8 mm. long; rachis glabrous, margined, sparingly glandular-dotted; stipels gland- 

 like; peduncles at the ends of the branches and opposite the leaves, 3-10 cm. long; spikes dense, 

 2-8 cm. long, about 8 mm. thick; Bracts lanceolate or lance-ovate, acuminate, caducous, mem- 

 branous, mostly pale, ciliate on the margins and slightly pilose on the back; calyx-tube turbinate, 

 silky-pilose, 3 mm. long; lobes lanceolate, subulate-acuminate, about equaling the tube; 

 corolla white or tinged with rose or lilac; blade of the banner hastately obovate, with a trun- 

 cate base and acute basal lobes, 2.5-3 mm. long; blades of the wings obliquely oblong, 2 mm. 

 long, with a rounded basal lobe, those of the keel-petals more obovate, with a less distinct 

 basal lobe, soon distinct; pod pilose at the apex. 



Type locality: North America. 



Distribution: Illinois to South Dakota, Alabama, and New Mexico. 



Illustrations: Michx. Fl. Bor. Am. pi. 38; Britt. & Brown, 111. Fl. /. 2106; ed. 2./. 2509. 



66. Parosela Thouini (Schrank) Rydberg. 



Dalea Thouini Schrank, PI. Rar. Hort. Monac. 1: 9. 1819. 



Dalea annua Thouin; Schrank, PI. Rar. Hort. Monac. 1 : 9, as synonym. 1819. 



Petalostemon sessilis Moc. & Sesse; DC. Prodr. 2: 246, as synonym. 1825. 



A low annual; stem 1-2 dm. high, glabrous, branched near the base, with spreading or 

 assurgent branches; leaves 1-3 cm. long; stipules subulate, 2-3 mm. long; rachis glabrous and 



