652 ‘CACTACEA. 
29. Opuntia. karwinskiana, Salm Dyck, Cact. ed. 2, p. 239. 
Mexico (Karwinski). Hort. Kew. 
30. Opuntia kleiniw, DC. Rev. Cact. p. 118. 
SourH Mexico, without locality (Coulter), common at Ismiquilpan and Zimapan, and 
at Las Ajuntas, on the Montezuma river (Ehrenberg). Hort. Kew. 
31. Opuntia leptocaulis, DC. Rev. Cact. p. 118; Pfeiff. Enum. p. 173; Salm 
Dyck, Cact. ed. 2, p. 250. 
Nortu Mexico, Chihuahua (Potts) ; South Mexico, without locality (Coulter), com- 
mon about Ismiquilpan, Zimapan, Las Ajuntas, &c. (Ehrenberg). Hort. Kew. 
32. Opuntia leucacantha, Hort. Berol., ex Pfeiff. Enum. p. 167. 
MEXxIco. 
33. Opuntia leucosticta, Wendl. Cat. Hort. Herrenh. 1835; Pfeiff. Enum. p. 167. 
MEXxico. 
34. Opuntia leucotricha, DC. Rev. Cact. p. 119; Pfeiff. Enum. p. 156. 
Mexico, without locality (Coulter). Hort. Kew. 
35. Opuntia macrocentra, Engelm. Cact. U.S. & Mex. Bound. Surv. p. 49, t. 76. . 
fig. 8. 
Texas.—Nortu Mexico, along the Rio Grande (Wright). 
36. Opuntia mamillata, Schott in Engelm. Cact. U.S. & Mex. Bound. Surv, 
p. 58, t. 75. fig. 19. 
Norrr Mexico, Sonora, on the Sierra Babuquibari (Schott), 
87. Opuntia megacantha, Salm Dyck, Hort. Dyck. p. 363; Pfeiff. Enum. p. 160. 
MExico. 
38. Opuntia microdasys, Lehm. Ind. Sem. Hort. Hamb. 1827; Nov. Act. Nat. 
Cur. xvi. pars 1, p. 317; Pfeiff. Enum. p. 154; Salm Dyck, Cact. ed. 2, p. 241. 
South Mexico, Ismiquilpan, Zimapan, and Las Ajuntas (Ehrenberg). Hort. Kew. 
6. minor, Salm Dyck, Hort. Dyck. p. 186. 
Opuntia pulvinata, DC. Rev. Cact. p. 119. 
Souta Mexico, without locality (Coulter). 
39. Opuntia oblongata, Wendl. Cat. Hort. Herrenh. 1835; Pfeiff. Enum, p: 161. 
MExIco. 
40. Opuntia pheacantha, Engelm. Pl. Fendl. et Cact, U.S. & Mex. Bound. 
Surv. p. 49, t. 75. fige. 9-13. 
a. Nigricans, Engelm. loc. cit. p. 50. 
