490 CONTRIBUTIOlSrS FROM THE NATIONAL HERBARIUM. 



Costa of the leaflets central; leaflets often more than 3.5 mm. wide, obtuse or 

 I'oundecl at apex. 

 Standard petal glabrous. 



Leaflets numerous, L2 to 3 mm. wide 10. A. amorphoides. 



Leaflets 15 or fewer, 4 to 16 mm. wide 11. A. palmeri. 



Standard petal variously pubescent. 

 Venation of the leaflets reticulate. 



Calyx glabrous ; branches of the inflorescence glabrous or nearly so. 



12. A. simulans. 

 Calyx pubescent ; branches of the inflorescence densely pilose and often 



hispid 13. A. petraea. 



Venation of the leaflets not reticulate. 

 Leaflets 7 to 11. 



Leaflets glabrous or nearly so 14. A. fruticosa. 



Leaflets densely sericeous or pilose 15. A. vigil. 



Leaflets 15 or more. 



Leaflets 3.5 to 6 mm. wide 16. A. pringlei. 



Leaflets 2 mm. wide or narrower 17. A. paniculata. 



1. Aeschynomene americana L. Sp. PI. 713. 1753. 

 Arschynomene glandulosa Poir. in Lara. Encycl. Suppl. 4: 76. 1816. 

 AcscMjnomcne florihunda Mart. & Gal. Bull. Acad. Brux. 10": 180. 1843. 

 Aeschynomene americana depila Millsp. Field Mus. Bot. 1: 363. 1898. 

 Chihuahua to Sinaloa, Chiapas, Yucatan, and Veracruz. Widely distributed 



in tropical America ; type from Jamaica. 



Plants suffrutescent and sometimes a meter high, or often herbaceous ; leaf- 

 lets numerous, oblong-linear, about 1 cm. long; flowers small, pale yellow to 

 brownish yellow, sometimes striped with purple. " Huevo de rana " (Nica- 

 ragua); " hierba rosario " (I*orto Rico); " pegapega " (Cuba). 



Of some importance as a forage plant. 



2. Aeschynomene sensitiva Swartz, I'rodr. Veg. Ind. Occ. 107. 1788. 

 Sinaloa to Veracruz. Widely distributed in tropical America ; also in Africa. 

 Plants suffrutescent or herbaceous, sometimes 4 meters high ; leaflets oblong, 



6 to 15 mm. long ; flowers pale yellow with red veins, about 1 cm. long ; fruit 

 4 to 8 cm. long, 3 to 6 mm. vvide. " Hierba de cienaga," " hierba rosiirio " 

 (Porto Rico). 



3. Aeschynomene hispida Willd. Sp. PI. 3: 1163. 1800. 



Sinaloa and Durango to Veracruz and Oaxaca. Widely distributed in trop- 

 ical America. 



Herbaceous or sufl'rutescent ; flowers yellow, striix'd with red, 10 to 14 mm. 

 long. 



4. Aeschynomene hispidula H. B. K. Nov. Gen. & Sp. 6: 531. 1823. 

 MichoaCi'in to Veracruz and Oaxaca. Central America and South America ; 



type from Colombia. 



Herbaceous or suffrutescent, sometimes 3.5 meters high ; flowers scarcely 

 1 cm. long. 



5. Aeschynomene nivea T. S. Brandeg. Proc. Calif. Acad. II. 2: 150. 1889. 

 Baja California ; type fi-om Purfsima. 



Silvery-sericeous shrub, 0,0 to 1 meter high ; leaflets numerous, oblong- 

 linear, 4 to 10 mm. long; flowers ochroleucous or sulphur-yellow, 1 cm. long; 

 fruit usually of only 2 joints. 



I 



