Mamillaria.] CACTACEZ. 403 
M. gummifera. Engelm. in Wisliz. Rep. 21; Gray, Pl. Lindh. 199; Syn. Cact. 264 
(8); Cact. Mex. Bound. 8, t. 9, f. 18-20. Walp. Ann. 2. 681. 
M. Heyderi. Muhlenpf. in Allg. Gart. Zeit. 16. 20 (Bot. Zeit. 7.598). Scheele, 
Roem. Texas, 435. Walp. Ann. 2. 680 & 5. 35. Engelm. Syn. Cact. 263 (7) ; Cact. 
Mex. Bound. 8, t. 9, f. 4-14. 
M. applanata. Engelm. in Gray, Pl. Lindh. 198. Salm, Cact. Hort. Dyck. 109. 
Lab. Monogr. Cact. 84. 
M. declivis. Dietr. Allg. Gart. Zeit. 18. 235. Walp. Ann. 2. 680. 
M. Texensis. Labouret, Monogr. Cact. 89. 
Var. hemispherica. Engelm. Syn. Cact. 1. c.; Cact. Mex. Bound. 8, t. 9, 
f. 15-17. 
M. hemispherica. Engelm. in Gray, Pl. Lindh. 198. Walp. 1. ¢. 
M. lasiacantha. Engelm. Syn. Cact. 261 (5); Cact. Mex. Bound. 5. & 75, t. 3, 4. 
Walp. Ann. 5. 33. 
M. macromeris. Engelm. in Wisliz. Rep. 13; Syn. Cact. 270 (14); Cact. Mex. 
Bound. 16 & 74, t.14, 15. Salm, Cact. Hort. Dyck. 185. Lab. Monogr. Cact. 
145. Walp. Ann. 3. 895. 
M. dactylithele. Labouret, 1. c. 146. 
M. meiacantha. Engelm. Pac. R. Rep. 4. 27; Syn. Cact. 263 (7); Cact. Mex. 
Bound. 9, t. 9, f.1-3. Walp. Ann. 5. 35. 
M. micromeris. Engelm. Syn. Cact. 260 (4); Cact. Mex. Bound. 3 & 75, t.1 & 2, 
f.1-4. Walp. Ann. 5. 33. Wood, Cl.-Book, 360. 
Var. Greggii. Engelm. Syn. Cact. 261 (5). Walp. 1. e. 
M. Missouriensis. Sweet, Hort. Brit. 171. Don, Mill. 3. 160.  Dietr. 3. 94. 
Cactus mamillaris. Nutt. Genera, 1. 295, not Linn. James, Long’s Exped. 2. 140. 
Torrey, Ann. Lyc. N. Y. 2. 202. Eat. & Wr. 163. 
M. simpler. Torr. & Gray, FI. 1. 553. 
M. Nuttallii. Engelm. in Gray, Pl. Fendl. 49; Gray, Pl. Lindh. 199; Pl. Upp. 
Miss. 192; Syn. Cact. 260 (14); Cact. Mex. Bound. t. 74, f. 6 (seed); King’s Rep. 
5.116. Walp. Ann. 2. 680 & 5. 35. 
Var. ceespitosa. 
M. cespitosa. Gray, Struct. Bot. 421, f. 838. 
M. similis. Engelm. Pl. Lindh. 246 (88); Gray, Pl. Lindh. 200 (Allg. Gart. 
Zeit. 16. 18). Salm, Cact. Hort. Dyck. 106. Lab. Monogr. Cact. 79. 
M. Nuttallii, var. cespitosa. Engelm. Syn. Cact. 265 (9); Cact. Mex. Bound. 
10, t. 74, f. '7 (sced).. Walp. Ann. 5. 86. Porter, Fl. Col. 47. 
Var. robustior. 
M. similis, var. robustior, Fngelm. in Gray, Pl. Lindh. 200. Salm, 1. e. 
M. Nuttallii, var. robustior. Engelm. & Bigel. Pac. R. Rep. 4. 28. Engelm. Syn. 
Cact. 265 (9). Walp. Ann. 5. 36. 
M. pectinata. Engelm. Syn. Cact. 266 (10); Cact. Mex. Bound. 12 & 74, t. 11. 
Walp. Ann. 5. 36. 
M. phellosperma. Engelm. Syn. Cact. 262 (6); Cact. Mex. Bound. 6, t. 7; Ives’ 
Rep. 12; King’s Rep. 5. 115; Bot. Calif. 1.244. Engelm. & Bigel. Pac. R. Rep. 
4.27. Torrey, same, 5. 360. Walp. Ann. 5. 54. 
M. tetrancistra. Engelm. in Am. Journ. Sci. 2. 14. 337, in part. Bigelow, Pac. 
R. Rep. 4. 15. 
M. Pottsii. Scheer; Salm, Cact. Hort. Dyck. 104. Scheer, Seem. Bot. Herald, 
287. Lab. Monogr. Cact. 72. Engelm. Syn. Cact. 268 (12). Walp. Ann. 5. 37. 
