CACTACEA. 5d1 
17. Opuntia ferox, Haw. Suppl. p. 82; Pfeiff. Enum. p. 167. 
Mexico? Hort. Kew. 
18. Opuntia ficus-indica, Mill. Dict. ed. 6; Pfeiff. Enum. p. 152; Salm Dyck, 
Cact. ed. 2, p. 235. 
Opuntia vulgaris, Tenore, Syll. Fl. Neap. p. 239, ex Pfeiff. loc: cit. 
Mexico, cultivated south of the Rio Grande (Engelmann). Hort. Kew. 
19. Opuntia filipendula, Engelm. Cact. U.S. & Mex. Bound. Surv. p. 51, t. 68. 
Trxas.—Norta Mexico, along the Rio Grande (Wright ). 
20. Opuntia frutescens, Engelm. Pl. Lindh. 1845; Synop. Cact. U.S. &c. p. 53. 
a. longispina, Engelm. loc. cit. | 
6. brevispina, Engelm. loc. cit. 
Texas; Catirornta.—Norta Mexico, Matamoras and Saltillo westward to Sonora (ex 
Engelmann), Chihuahua (Potts), Monterey (Plotz). Hort. Kew. 
21. Opuntia fulgida, Engelm. Cact. U.S. & Mex. Bound. Surv. p. 57, t. 78. 
fig. 18. 
Norra Mexico, throughout all the sierras in Western Sonora (ex Engelmann). 
22. Opuntia glaucescens, Hort. Berol., ex Pfeiff. Enum. p. 155. 
MExico. | 
23. Opuntia glaucophylla, Wendl. Cat. Hort. Herrenh. 1835; Pfeiff. Enum. 
p- 162. ; | 
Mexico. Hort. Kew. 
24. Opuntia grandis, Hort. Angl., ex Pfeiff. Enum. p. 155. 
Mexico. Hort. Kew. 
25. Opuntia gracilis, Hort. Monac., ex Pfeiff. Enum. p. 172. 
_ Mexico. : 
26. Opuntia grahami, Engelm. Cact. U.S. & Mex. Bound. Surv. p. 55, t. 72. 
Nort Mexico, along the Rio Grande (Wright, Bigelow). 
27. Opuntia hernandezii, DC. Rev. Cact. p. 69, t. 16, et Prodr. iii. p. 474. 
Nopal sylvestre, Thierry-Menonv. Voy. Guax. ii. p. 277, cum icone. 
Sout Mxxico, temperate regions in the State of Oaxaca. 
28. Opuntia imbricata, DC. Prodr. iii. p. 471. 
Cereus imbricatus, Haw. Synop. p. 183. 
Opuntia cristata, Salm Dyck, Cact. ed. 2, p. 73. 
Opuntia exuviata, Salm Dyck, loc. cit. 
Nortu Mexico, near Chihuahua (Potts); Sourn Mexico, Zacualco (Bourgeau, 264). 
Hort. Kew. — 
