Opuntia.] CACTACEZ. 409 
O. rutila. Nutt.; Torr. & Gray, Fl. 1.555. Dietr. 3.116. Gray, Proc. Acad. 
Philad. 1863, 61. Engelm. in King’s Rep. 5. 119; Bot. Calif. 1. 248. 
O. erinacea. Engelm. & Bigel. Pac. R. Rep. 4. 47, t. 13, f. 8-11, & t. 24, f. 4 
(seed). Engelm. Syn. Cact. 301 (45); King’s Rep. 5. 119. Walp. Rep. 5. 53. 
O. Schottii. Engelm. Syn. Cact. 304 (48); Cact. Mex. Bound. 54, t. 73, f. 1-4. 
Walp. Ann. 5. 54. 
O. serpentina. Engelm. in Am. Journ. Sci. 2. 14. 338; Syn. Cact. 306 (50) ; 
Cact. Mex. Bound. 56; Bot. Calif. 1.250. Engelm. & Bigel. Pac. R. Rep. 4. 50. 
Walp. Ann. 5. 55. 
2 Cereus (?) Californicus. Torr. & Gray, Fl. 1.555. Engelm. in Am. Journ. 
Sci. 2. 14. 558. 
O. setispina. Engelm.; Salm, Cact. Hort. Dyck. 239. Lab. Monogr. Cact. 466. 
Engelm. Syn. Cact. 294 (388). Walp. Ann. 5.51. (Chihuahua.) 
O. sphzrocarpa. Engelm. & Bigel. Pac. R. Rep. 4. 47, t. 13, f. 6-7, & t. 24,£.3 
(seed). Engelm. Syn. Cact. 300 (44). Walp. Ann. 5. 53, 
Var. (?) Utahensis. Engelm. in Hayd. Rep. 1871, 483. 
O. stenopetala. Engelm. Syn. Cact. 289 (33) ; Cact. Mex. Bound. 46 & 76, t. 66. 
Walp. Ann. 5. 48. Young, Fl. Texas, 278. (Northern Mexico.) 
O. Strigil. Engelm. Syn. Cact. 290 (34); Cact. Mex. Bound. 47, t.67. Walp. 
Ann. 5. 48. Young, Fl. Texas, 278. 
O. tenuispina. Engelm. Syn. Cact. 294 (38); Cact. Mex. Bound. 50, t. 75, f. 14 
(seed). Walp. Ann. 5. 50 (as O. minor). 
O. tessellata. Engelm. Pac. R. Rep. 4. 52, t. 21, & t. 24, f. 20 (seed) ; Syn. Cact. 
309 (53); Cact. Mex. Bound. 60; Bot. Calif. 1.249. Torrey, Pac. R. Rep. 5. 360. 
Walp. Ann. 5. 57. Watson, Pl. Wheeler, 9. 
O. ramosissima. Engelm. in Am. Journ. Sci. 2. 14. 339. 
O. Thurberi. Engelm..Syn. Cact. 308 (52); Cact. Mex. Bound. 59. Walp. Ann. 
5. 57. (Sonora.) 
O. tortispina. Engelm. & Bigel. Pac. R. Rep. 4. 41, t. 8, f. 2,3, & t. 23, f 1-5 
(seeds). Engelm. Syn. Cact. 293 (37); Simpson’s Rep. 441. Walp. Ann. 5. 40. 
O. Tuna, Mill. Engelm. in Wisliz. Rep. 16; Am. Journ. Sci. 2. 14. 338; Syn. Cact. 
290 (34); Bot. Calif. 1.248. Thurber in Gray, Pl. Thurb. 302. Bigelow, Pac. R. 
Rep. 4. 16. 
O. Bonplandii. HBK. Nov. Gen. 6. 69. 
O. tunicata. Otto; Pfeiffer, Enum. Cact.170. Salm, Cact. Hort. Dyck. 249. 
Walp. Rep. 2. 352. (Northern Mexico.) 
O. exuviata. DC. Rev. Cact. 118, excl. vars. Pfeiffer, 1.c. Walp. l. ec. 
O. bulbispina. Engelm. Syn. Cact. 304 (48); Cact. Mex. Bound. 55, t. 73, 
f.5,6. Walp. Ann. 5. 55. 
O. vulgaris. Haworth, Syn. Pl. Suce. 190. Salm, Obs. Bot. 9. DC. Prodr. 
3.474. Don, Mill. 3.175. Beck, Bot. 135, in part. Torr. & Gray, FI. 1. 555, 
in part. Dietr. 3.112. Pfeiffer, Enum. Cact. 149. Walp. Rep. 2. 347. Loud. 
Arb. 2. 967, f. 2474. Engelm. Syn. Cact. 297 (41); Torrey, Bot. Bull. 2. 54. 
Scheele, Roem. Texas, 435. Lab. Monogr. Cact. 477. Engelm. & Bigel. Pac. R. 
Rep. 4. 41, t. 5, f. 2,3, & t. 23, f. 1-5 (seeds). Walp. Ann. 5. 52. Chapman, 144. 
Gray, Manual, 185. Helmsley, Garden, 11. 274. 
Cactus Opuntia. Linn. Spec. 468, in part. Walter, 146. Bartram, Trav. 165. 
Willd. Spec. 2. 943. Michx. Fl. 1.282. Persoon, 2. 22. Pursh, 327. Nutt. Gen. 
