544 CACTACER. 
41. Cereus macdonaldix, Hook. Bot. Mag. t. 4707. 
Honpvras (Mrs. Macdonald). Hort. Kew. 
42, Cereus? micracanthus, DC. Rev. Cact. p. 115. 
Mexico, without locality (Coulter). 
43, Cereus marginatus, DC. Rev. Cact. p. 116 
Sovura Mexico, without locality ( Coulter), Mestitlan &c., frequently used for hedges 
(Ehrenberg). Hort. Kew. | 
44, Cereus martianus, Zucc. in Flora, ii. 1832, Beibl. p. 66; Pfeiff. Enum. 
p. 110; Bot. Mag. t. 3768. 
South Mexico, Zimapan, San José del Oro. Hort. Kew. 
45. Cereus napoleonis, Hook. Bot. Mag. t. 3458. 
Cereus triangularis, var. 8. major, Pfeiff. Enum. p. 117. 
Cereus undatus, Haw. Phil. Mag. 1880, p. 109, 
Mexico? Hort. Kew. 
_ 46. Cereus nycticalus, Link in Verhandl. des Gartenb.-Vereins fiir Preuss. x. 
p. 373, t. 4; Salm Dyck, Cact. ed. 2, p. 216. 
Cereus pterandra, Link, ex Pfeiff. Enum. p. 118. 
Mexico. Hort. Kew. 
47, Cereus pectinatus, Engelm. Synop. Cact. U.S. &c. p. 23. 
Echinocactus pectinatus, Scheidw. in Bull. Acad. Brux. vi. p. 3. 
Echinocactus pectiniferus, Lem. Cact. Gen. Nov. p. 25. 
Echinopsis pectinata, Fennel in Otto & Dietr. Allg. Gartz. 1843, p. 282; Pfeiff. & Otto, Abbild. ii. 
t. 10. 
NortH Mexico, Chihuahua, Sonora (Schot#), received from San Luis Potosi (ex 
Ehrenberg). 
Var. 78. armata, Poselg. ex Engelm. loc. cit. 
Nortu Mexico, Monterey (ex Engelmann). 
Var. ty. rigidissima, Engelm. loc. cit. 
Nortu Mexico (ex Engelmann). 
Scheer, in Seemann’s ‘ Botany of the Voyage of the “ Herald,” ’ ’ partially describes 
six forms near C. pectinatus, n. 280-285 inclusive. 
48. Cereus pentalophus, DC. Rev. Cact. p. 117. 
Sout Mexico, Puente de Dios, and in the Barrancas of Mestitlan and Zimapan, on 
' chalk cliffs (Ehrenberg). Hort. Kew. 
Pfeiffer (Enum. p. 101) includes C. propinguus and C. leptacanthus under this. 
49, Cereus procumbens, Engelm. in Bost. Journ. Nat. Hist. vi p. 203. 
Trxas.—NortH Mexico, below Matamoras (ex Engelmann). 
