152 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM. 



Shrub 1.8 meters high ; branchlets retrorse-pubescent ; petioles 1 cm. long or 

 shorter ; leaf blades ovate-lanceolate, about 15 cm. long and 5.5 cm. wide, 

 acuminate, unequal at the base. " Matico " (Colima) ; "hachogue" (Colima, 

 Rose). 



The plant is said to be used for washing clothes. A decoction is employed 

 as a remedy for colic in man and horses, and for cutaneous diseases. 



26. Piper rohrii C. DC. in DC. Prodr. 16': 296. 1869. 



Oaxaca. Central America and South America ; type from French Guiana. 

 Branchlets glabrous; petioles 2.5 cm. long; lenf blades short-acuminate, sub- 

 attenuate at the base, glabrous. 



27. Piper cordovanum C. DC. Linnaea 37: 352. 1873. 



Known only from the type locality, Valley of Cordoba, Veracruz. 

 Branchlets glabrous ; petioles 3.5 cm. long ; leaf blades acuminate, unequal 

 and obtuse at the base, glabrous. 



28. Piper potomorphe (Miquel) C. DC. in DC. Prodr. 16": 308. 1869. 

 Artanthe potomorphe Miquel, Syst. Piper. 403. 1844. 



Known only from the type locality, Cordillera of Veracruz. 

 Petioles 7 to 8 cm. long; leaf blades short-acuminate, deeply cordate at the 

 base. 



29. Piper variifolium (Miquel) C. DC. in DC. Prodr. 16': 308. 1869. 

 Enckea variifolia Miquel, Syst. Piper. 355. 1844. 



Veracruz. 



Branchlets glabrous ; petioles 6 to 8 mm. long ; leaf blades acute or acuminate, 

 rounded at the base. 



30. Piper berlandieri C. DC. in DC. Prodr. 16': 295. 1869. 



Tamaulipas to Veracruz and Oaxaca ; type collected between Tampico and 

 Real del Monte. 



Shrub or small tree, 2 to 6 meters high ; petioles about 1.5 cm. long ; leaf 

 blades obovate-oblong, about 9.5 cm. long and 4.5 cm. wide, short-acuminate, 

 acutish at the base, glabrous. 



31. Piper tuberculatum Jacq. Icon. PI. Rar. 2: 2. pi. 210. 1786. 



Veracruz to Tepic, Oaxaca, and Tabasco. Central America, West Indies, 

 and South America. 



Shrub or small tree. 2 to 6 meters high ; branchlets puberulent ; leaf blades 

 obliquely ovate or ovate-oblong, 7 to 14 cm. long, 4 to 6 cm. wide, subacuminate, 

 very unequal at the base. " Cordoncillo " (Tabasco, Chiapas). 



32. Piper g'eniculatum. Swartz, Prodr. Veg. Ind. Occ. 15. 1788. 



Veracruz to Tabasco and Chiapas. Central America, AVest Indies, and South 

 America; type from Jamaica. 



Shrub or small tree, up to 6 meters high ; leaves short-petiolate, the blades 

 lance-ovate or lance-oblong, sometimes 25 cm. long and 12 cm. wide, acuminate, 

 very unequal at the base. "Cordoncillo" (Tabasco). 



33. Piper melanostictum (Miquel) C. DC. in DC. Prodr. 16': 274. 1869. 

 Artanthe melanosticta Miquel, Syst. Piper. 404. 1844. 



Known only from Tabasco, the type locality. 



Branchlets glabrous; leaf blades ovnte-oblong, 19 cm. long, 7.5 cm. wide, 

 subobtuse, imequal at the base. 



34. Piper oaxacanum C. DC. in DC. Prodr. 16': 274. 1869. * 

 Known only from the type locality, Oaxaca. 



Branchlets glabrous; leaf blades oblong-elliptic or ovate-elliptic, 16.5 cm. 

 long. 6.5 cm. wide, acuminate, unequal and acute at the base. 



