Opuntia.] CACTACEZ. 407 
O. fragilis, var. frutescens. Engelm. Pl. Lindh. 245 (37). 
O. frutescens. Engelm. in Wisliz. Rep. 28; Gray, Pl. Lindh. 208; Syn. Cact. 309 
(53); Cact. Mex. Bound. 60 & 77; King’s Rep. 5. 120. Scheele, Roem. Texas, 434. 
Salm, Cact. Hort. Dyck. 251. Lab. Monogr. Cact. 494. Scheer, Seem. Bot. 
Herald, 293. Torr. & Gray, Pac. R. Rep. 2.165. Engelm. & Bigel. Pac. R. Rep. 
4. 53, t. 20, f. 2, 3, & t. 24, f. 16-18 (seed). Walp. Ann. 5.57. Gray, Hall’s Pl. 
Texas, 9. 
Var. brevispina. : 
2 O. gracilis. Mart. Hort. Monac.; Pfeiffer, Enum. Cact. 172. Walp.l.c. Salm, 
Cact. Hort. Dyck. 251. 
2 O. virgata. Hort. Vindob. 
O. frutescens, var. brevispina. Engelm. Pac. R. Rep. 4. 56, t. 20, f. 4,5, & t. 24, 
f. 19 (seed) ; Syn. Cact. 309 (53). Walp. Ann. 5. 57. 
Var. vaginata. 
O. vaginata. Engelm. in Wisliz. Rep. 16; Emory’s Rep. 158, f.12; Syn. Cact. 
309 (53). Walp. Ann. 3. 897 & 5.57. Engelm. & Bigel. Pac. R. Rep. 4. 52, t. 20, 
f.1, & t. 24, f. 13-15 (seeds). 
O. macrocentra. Engelm. Syn. Cact. 292 (36) ; Cact. Mex. Bound. 49, t. 75, f. 8 
(seed). Walp. Ann. 5. 50. 
O. mamillata. Schott; Engelm. Syn. Cact. 308 (52); Cact. Mex. Bound. 58, 
t. 75, f. 19 (seed) ; Bot. Calif. 1. 250. Walp. Ann. 5. 57. 
O. microdasys. Lehm. Ind. Sem. Hamb. 1827, 16; Act. Acad. Leop. 16. 317 
(Pug. Pl. 1.11 &2.5). Pfeiffer, Enum. Cact. 154. Walp. Rep. 2. 348. Salm, 
Cact. Hort. Dyck. 241. Lab. Monogr. Cact. 471. Engelm. Syn. Cact. 298 (42). 
(North-eastern Mexico.) 
O. pulvinata. DC. Rev. Cact. 119. 
O. Missouriensis. DC. Prodr. 3.472. Salm, Hort. Dyck. 363; Cact. Hort. 
Dyck. 67. Don, Mill. 5 172. Torr. & Gray, Fl. 1. 555, in part. Pfeiffer, Enum. 
Cact. 158. Walp. Rep. 2. 349; Ann. 5.55. Dietr. 3.114. Torrey, Frem. Rep. 
go; Emory’s Rep. 408. Spach, Hist. Veg. 13.405. Engelm. Pl. Lindh. 38; PI. 
Upp. Miss. 192; Syn. Cact. 299 (43); King’s Rep. 5.118; Hayd. Rep. 1871, 483; 
Simpson’s Rep. 442. Lab. Monogr. Cact. 461. Engelm. & Bigel. Pac. R. Rep. 
4, 44, t. 14, f. 1-3, & t. 23, f.16 (seed). Gray, Pac. R. Rep. 12. 43; Proc. Acad. 
Philad. 1865, 61; Manual, 185. Pl. Bourgeau, 256. Porter, Fl. Col. 49. Helms- 
ley, Garden, 11. 275. 
Cactus ferox. Nutt. Genera, 1. 296, not Willd. James, Long’s Exped. 2. 140 & 
156. Torrey, Ann. Lyc. N. Y. 2. 202. Eat. & Wr. 163. 
O. polyacantha. Haworth, Syn. Pl. Suce. Suppl. 82. 
O. media. Haworth, Syn. Pl. Suce. Suppl. 82; fide Salm, Hort. Dyck. 363. 
Pfeiffer, Enum. Cact. 158. Dietr. 3.114. Walp. Rep. 2. 350. 
% O. splendens. Wort. Angl.; Pfeiffer, 1. c. 159. 
O. Missouriensis, var. elongata. Salm, Cact. Hort. Dyck. 67. 
Var. platycarpa. Engelm. Pac. R. Rep. 4. 46, t. 14, f. 4, & t. 23, f. 17 (seed) ; 
Syn. Cact. 300 (44). Walp. 1. ¢. 
Var. microsperma. Engelm. Il. cc., t. 14, f. 5-7, & t. 24, f. 1, 2 (seeds). 
Walp. 1. c. 
Var. albispina, Engelm. ll. cc. t. 14, f. 8-10, & t. 23, f. 18 (seed); Simpson’s 
Rep. 442. Walp. Ann. 5. 53. 
Var. trichophora. Engelm. 1. c. t. 15, f. 1-4, & t. 23, f. 19 (seed) ; Syn. Cact. 44. 
Walp. 1. e. 
