. 612 CACTACEA. 
108. Mamillaria hexacantha, Salm Dyck, Hort. Dyck. p. 344, ex Pfeiff. 
Enum. p. 30. 
Mexico, near Las Ajuntas, where the Montezuma river joins the Toliman (Ehrenberg). 
109. Mamillaria heyderi, Miihlpf. in Otto & Dietr. Allg. Gartz. xvi. p. 20; 
Walp. Ann. ii. p. 680. — oo 
Var. «. applanata, Engelm. in Pl. Lindh. © i OS 
Var. B. hemisphzrica, Engelm. loc. cit. ae 
Texas.—NortH Mexico, Matamoras, Sonora (Schott). 
110. Mamillaria humboldtii, Ehrb. in Linnea, xiv. p. 378; Salm Dyck, Cact. 
ed. 2, p. 85. | | | 
SoutH Mexico, Ismiquilpan and Mestitlan, on calcareous rocks (Ehrenberg). 
111. Mamillaria hystrix, Mart., ex Salm Dyck, Cact. ed. 2, p. 119. 
NortH Mexico, San Luis Potosi; Soura Mexico, Oaxaca (Ehrenberg). 
112. Mamillaria incurva, Scheidw. in Bull. Acad. Brux. vi. p. 6. 
Mexico. 
113. Mamillaria intertexta, DC. Rev. Cact. p. 110. 
NortH Mexico, Chihuahua; South Mexico, without locality (Coulter), Zimapan 
(Ehrenberg). Hort. Kew. | 
114. Mamillaria irregularis, DC. Rev. Cact. p. 111. 
Mexico (Coulter, 31). 
115. Mamillaria isabellina, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 309; 
Walp. Ann. ii. p. 678. 
MEXxICco. 
116. Mamillaria jucunda, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 250; 
Walp. Ann. ii. p. 675. 
Mexico. 
117. Mamillaria karwinskiana, Mart. in Act. Nov. Nat. Cur. xvi. pt. 1, 
p. 336, t. 22. 
Sours Mexico, without locality (Karwinski), Oaxaca (Ehrenberg). Hort. Kew. 
117*. Mamillaria kleinii, Regel, Ind. Sem. Hort. Petrop. 1860, p. 47. 
Mexico (Karwinski). 
118. Mamillaria klugii, Ehrb. in Bot. Zeit. ii. p. 834. 
MEXIco. 
119. Mamillaria krameri, Miihlpf. in Otto & Dietr. Allg. Gartz. xiii. p. 347 ; 
Walp. Rep. v. p. 810. 
Mamillaria pachythele, Salm Dyck, Cact. ed. 2, pp. 17 et 122. 
SoutH Mexico, Real del Monte (ex Miihlenpfordt). 
