166 NORTH AMERICAN FLORA [Volume 24 



leaflets 21-4 I, linear-oblong or linear, 4- 7 cm. long, 8-18 mm. wide, obtuse or acutish, mucronate 

 at the apex, short-silky above, densely long-silky beneath; racemes terminal and in the upper 

 axils, 1-2 dm. long, dense, many-flowered; flowers 3-6 at each node; bracts subulate- 

 setaceous, acuminate, caducous; calyx densely reddish-velutinous, the tube 2.5-3 mm. long, 

 the lobes ovate, 3 mm. long, abruptly acute; corolla whitish or pale-yellow, 1.5-20 mm. long; 

 banner orbicular, silky on the back, short-clawed; wings obliquely oblanceolate, with a rounded 

 basal auricle; pod 5-7 cm. long, 5-6 mm. wide, densely ferruginous- villous, I0-15-seeded; 

 seeds 4 mm. long, 2.5 mm. broad. 



Type locality: West Indies. 



Distribution: Jamaica; southern Mexico to Bolivia, Northern Brazil, and Guiana. 

 Illustrations: Tuss. FI. Ant. 1: pi. 20; Descourt. Fl. Ant. pi. 1X3; Mart. Fl. Bras. 25: pi. 8; 

 Plum. PI. Am. pi. 135. 



18. Cracca Talpa (vS. Wats.) Rose, Bot. Gaz. 40: 143. 1905. 



Tephrosia emarginata Mart. & Gal. Bull. Acad. Brux. 10': 48. 1843. Not T. cmarginalaH.B.K..' 



1823. 

 Tephrosia Talpa S. Wats. Proc Am. Acad. 22: 405. 1887. 



A perennial, with a woody cespitose base; stems 3-6 dm. high, sulcate, densely villous, 

 subvelutinous, with yellowish pubescence; leaves 1-2 din. long; stipules 10-12 mm. long, 

 linear-setaceous; petiole 2-5 cm. long, as well as the rachis densely villous, sulcate; leaflets 

 11-21, oblong, rounded at each end, coriaceous, silky on both sides, densely so and strongly 

 veined beneath, 3-5 cm. long, 1-1.5 cm. wide; racemes terminal and rarely one or two in the 

 upper axils, 1-2 dm. long, many flowered; flowers 3-6 at each node; calyx silky villous, the 

 tube 2.5 mm. long, the lobes 3 mm. long, lanceolate, acuminate; corolla rose colored, 15-18 

 mm. long; banner suborbicular, silky without; wings obliquely oblanceolate, with a rounded 

 basal auricle; pod 3-5 cm. long, 6 mm. wide, straight, densely villous, 4-6-seeded; seeds mottled, 

 3 mm. long, 2 mm. broad. 



Type locality: Rio Blanco, Jalisco. 



Distribution: Durango and Sonora to Oaxaca. 



19 Cracca arcuata Rydberg, sp. nov 



Cracca toxicaria Standley, Contr. U.S.Nat. Herb.23: 471,473. 1922. NotC.loxicaria Kuntze. 1891. 



A shrub, up to 7 m. high; branches angled, short-pubescent with spreading hairs; leaves 

 1.5-2 dm. long; stipules subulate, deciduous; the short petiole and rachis short-hirsute; leaf- 

 lets 31-37, linear or lance-linear, acute, 3-4 cm. long, 7-8 mm. wide, silky or in age nearly 

 glabrous above, densely villous beneath; racemes elongate, 1.5-2 dm. long; flowers 2 or 3 at 

 each node; calyx villous with yellowish hairs, the tube 3 mm. long, the lobes lance-subulate, 

 3 mm. long; corolla about 1.5 cm. long; banner obovate; wings obliquely oblanceolate; pod 

 about 5 cm. long, 4-5 mm. wide, decidedly arcuate, short-hirsute, 8-10-seeded. 



Type collected on Maria Madre, Tres Marias Islands, Tepic, May 1897, E. XV. Nelson 4193 

 (U. S. Nat. Herb. no. 345936). 



Distribution: Tepic to Oaxaca. 



20. Cracca Heydeana Rydberg, sp. nov. 



A perennial, suffruticose at the base; stems sulcate, finely villous; leaves 1-2 cm. long; 

 stipules subulate, 3-5 cm. long; petiole 1-2 cm. long, as well as the rachis sulcate, densely 

 villous; leaflets 21-29, oblong, subcoriaceous, rounded at both ends, 2-4 cm. long, 7-12 mm. 

 wide, silky on both sides, rather densely so beneath; racemes several, terminal and from the 

 upper axils, 1-2 dm. long, rather lax; flowers 2-4 at each node; bracts subulate, 8-10 mm. 

 long; calyx silky, the tube 2.5 mm. long, the lobes subulate, acuminate, 3 mm. long; corolla 

 apparently white or sulphur-yellow, 14-15 mm. long; banner oval, silky without; wings linear- 

 oblanceolate, with a rounded basal auricle; pod slightly upcurved, 5-6 cm. long, 4 mm. wide, 

 densely short-villous, 6-9-seeded; seeds brown, 3 mm. long, 2 mm. broad. 



Type collected at Cerro Rcdondo, Santa Rosa, Guatemala, October, 1893, HeyJe cV Lux (Don 

 nell Smith's dist. no.) 6111 (herb. Columbia Univ.). 



Distribution: Guatemala to Panama. 



