488 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Calyx tube about 5 mm. long 7. N. platycalyx. 



Calyx tube 1.5 to 3.5 ram. long. 



Leaflets densely and persistently pilose beneath 8. N. hirsuta. 



Leaflets glabrous beneath or -nearly so. 

 Leaflets large, most of them 2.5 to 4 cm. long, all much longer than broad, 



9. N. laxior. 



Leaflets small, most of them 1 to 2 cm. long, those of the lower leaves 



usually oi'bicular or nearly so 10. N. pringlei. 



1. Nissolia dodgei Kose, Coutr. U. S. Nat. Herb. 5:161. f. 23. 189S). 

 Coahuila and Neuvo Le6n ; type from Monterrey, Nuevo Leon. 

 Leaflets 1 to 2 cm. long ; fruit 2 cm. long. 2 or 3-seeded. 



2. Nissolia setosa T. S. Brandeg. Proc. Calif. Acad. II. 3: 127. 1891. 

 Southern Baja California; type from Triunfo. 



Vine, 3 to 4 meters long; leaflets 5, orbicular, 1 to 2 cm. long; flowers 4 mm. 

 long, dark yellow. 



3. Nissolia schottii (Torr.) A. Gray, Jouru. Linn. Soc. 5: 26. 1861. 

 Chaetocalyx schottii Torr. U. S. & Mex. Bound. Bot. 56. pi. 18. 1859. 

 Chihuahua, Sonora, and Sinaloa ; type from Sierra Verde, Sonora. Southern 



Arizona. 



Leaflets 5, oval or orbicular, 1 to 3.5 cm. long; floAvers nearly 1 cm. Ions:: 

 fruit 2.5 to 3 cm. long. 



4. Nissolia wislizeni A. Gray, Journ. Linn. Soc. 5: 25. 1861. 

 Chaitocalyx tmslizeni A. Gray, PI. Wright. 1: 51. 1852. 



Chihuahua and Sonora to Zacatecas and Hidalgo; type collected near the 

 city of Chihuahua. Southern Arizona. 



Leaflets orbicular or nearly so, 8 to 15 mm. long; flowers 1 cm. long or 

 slightly larger. 



This species differs from the others in being prostrate rather than scandent. 

 The plants are nearly or quite herbaceous. 



5. Nissolia guatemalensis Rose, Contr. U. S. Nat. Herb. 5: 162. 1890. 

 Sinaloa. Guatemala (type locality). 



Leaflets oval, 3 to 7 cm. long, obtuse or acutish ; flowers 6 nnn. long, very 

 numerous, in long racemes. 



Although known in Mexico from a single locality far distant from Guate- 

 mala, the specimens can not be distinguished from those from the latter region. 



6. Nissolia nelsoni Rose, Contr. U. S. Nat. Herb. 5: 162. /. 26. 1899. 



Sinaloa and Jalisco to Veracruz and Chiapas; type from the Valley of 

 Oaxaca. 



Plants climbing to a height of 3 to 4.5 meters ; leaflets elliptic to orbicular, 

 2 to 5.5 cm. long, acutish to broadly rounded at apex. " Riatilla " (Sinaloa). 



It is doubtful whether this is distinct from N. fruticosa .Tacq., of Columbia. 



7. Nissolia platycalyx S. Wats. Proc. Amer. Acad. 17: 344. 1882. 



Known only from the type locality, in the mountains east of Saltillo, (Toa- 

 huila. 



8. Nissolia hirsuta DC Prodr. 2: 257. 1825. 



Nissolia confcrtiflora S. Wats. Proc. Amor. Acad. 21: 424. 1886. 

 Chihuahua to Sinaloa, Oaxaca, and Morelos ; type from Guanajuato. 

 Leaflets 1 to 5.5 cm. long, thin, bright green; wing of the fruit 1 cm. wide 

 or narrower. 



9. Nissolia laxior (Robinson) Rose, Contr. U. S. Nat. Herb. 5: 102. 1899. 

 NissoUa confertiflora laxior Robinson, I'roc. Amer. Acad. 29: 315. 1894. 



