400 CACTACES. |Echinocactus. 
EB. Californicus. Monville, Cat. 1846. Lab. Monogr. Cact. 199. Engelm. in 
Am. Journ. Sci. 2. 14. 338. (Lower California ?) ; 
E. cylindraceus. Engelm. Pac. R. Rep. 4.32; Syn. Cact. 275 (19); Cact. Mex. 
Bound. 25, t. 30; Bot. Calif. 1.245. Walp. Ann. 5.40. Fenzi, Bull. Soc. Tose. 
Ortic. 2. 54, f. 7. 
E. viridescens, var. (2) cylindraceus. Engelm. in Am. Journ, Sci. 2. 14. 338. 
E. Emoryi. Engelm. in Emory’s Rep. 156, f.5; Syn. Cact. 275 (19); Cact. Mex. 
Bound. 23, t. 28; Bot. Calif. 1.245. Engelm. & Bigel. Pac. R. Rep. 4. 31, t. 3, 
f.3. Walp. Ann. 5. 40. 
E. horizonthalonius. Lemaire, Cact. Noy. 19. Walp. Rep. 2. 3817. Salm, Cact. 
Hort. Dyck. 146. Lab. Monogr. Cact. 179. Engelm. Cact. Mex. Bound. 76. 
E. equitans. Scheidweil, Bull. Brux. 67. 2. Walp. Rep. 2. 3823. 
Var. centrispinus. Engelm. Syn. Cact. 276 (20); Cact. Mex. Bound. 26, t. 31, 
32, f.1-5. Walp. Ann. 5. 41. 
E. laticostatus. Engelm. & Bigel. Pac. R. Rep. 4. 52. 
E. intertextus. Engelm. Syn. Cact. 277 (21) ; Cact. Mex. Bound. 27, t.34. Walp. 
Ann. 5. 41. 
Var. dasyacanthus. Engelm. Syn. Cact. 1. ¢.; Cact. Mex. Bound. 28, t. 35, 
f.1-5. Walp. l.c. 
E. Johnsoni. Parry ; Engelm. in King’s Rep. 5. 117. 
E. longihamatus. Galeotti; Pfeiffer, Abbild. Cact.2,t.16. Salm, Cact. Hort. 
Dyck. 152. Lab. Monogr. Cact. 201. Hook. Bot. Mag. t. 4632. Scheer, Seem. 
Bot. Herald, 290. Engelm. Syn. Cact. 273 (17); Cact. Mex. Bound. 22 & 75, 
t. 21-24. Walp. Ann. 5. 39. 
E. flexispinus. Engelm. in Wisliz. Rep. 27. Walp. Ann. 3. 894. 
E. setispinus, var. longehamatus. Poselger, Allg. Gart. Zeit. 21. 119. 
Var. gracilispinus. Engelm. Syn. Cact.1.c.; Cact. Mex. Bound. 22. Walp. 
Ann. 5. 40. 
E. hamatocanthus. Muhlenpf. in Allg. Gart. Zeit. 14. 371. Walp. Ann. 1. 333. 
Var. brevispinus. Engelm. ll. ce. Walp. 1. c. 
BE. papyracanthus. Engelm. Trans. Acad. St. Louis, 2. 202; Simpson’s Rep. 
437. 
Mamillaria papyracantha. Engelm. in Gray, Pl. Fendl. 49; Syn. Cact. 264 (8). 
Walp. Ann. 2. 680. 
EB. Parryi. Engelm. Pac. R. Rep. 4. 32; Syn. Cact. 276 (20) ; Cact. Mex. Bound. 
25, t. 32, f.6, 7. Walp. Ann. 5.41. (Chihuahua.) 
E. polyancistrus. Engelm. & Bigel. Pac. R. Rep. 4. 29, t.2,f.1,2. Engelm. 
Syn. Cact. 272 (16); King’s Rep. 5. 116; Bot. Calif. 1. 245. Walp. Ann. 5. 39. 
E. polycephalus. Engelm. & Bigel. Pac. R. Rep. 4. 31, t. 3, f. 4-6. Engelm. 
Syn. Cact. 276 (20); Cact. Mex. Bound. 25; King’s Rep. 5. 117; Bot. Calif. 1. 246. 
Walp. Ann. 5. 41. Watson, Pl. Wheeler, 9. 
EB. pubispinus. Engelm. in Trans. Acad. St. Louis, 2. 199; King’s Rep. 5. 117; 
Simpson’s Rep. 439. 
EB. Scheerii. Salm, Cact. Hort. Dyck. 155. Scheer in Seem. Bot. Herald, 290. 
Lab. Monogr. Cact. 204. Engelm. Syn. Cact. 271 (15); Cact. Mex. Bound. 18, 
t.17. Walp. Ann. 5. 38. ; 
EB. setispinus. Engelm. in Gray, Pl. Lindh. 201; Syn. Cact. 272 (16) ; Cact. Mex. 
Bound. 21 & 75, t. 20, Dietr. Allg. Gart. Zeit. 16.18 & 19.44. Scheele, Roem. 
