BRITTON AND ROSE—CEREUS AND ITS ALLIES. 425 
Lemaireocereus dumortieri (Salm-Dyck). 
Cereus dumortiert Salm-Dyck, Cact. Hort. Dyck. ed. 2. 210. 1850. 
? Cereus anisacanthus DC. Mem. Mus. Paris 17: 116. 1828. 
TYPE LocALity: Not cited. 
Disrrisution: Michoacan, Zacatecas, Hidalgo, and Morelos, Mexico. 
Lemaireocereus eruca (Brandegee). 
Cereus eruca Brandegee, Proc. Cal. Acad. II. 2: 163. 1889, 
Type Locatity: ‘‘ Magdalena Island and about San Jorge,’’ Lower California. 
Distrisution: Lower California. 
ILLusTRATION: Brandegee, loc. cit. pl. 7. 
Lemaireocereus griseus (Haw. ). PLatre LXVII. 
Cereus griseus Haw. Syn. Pl. Succ. 182. 1812. 
Cereus eburneus Salm-Dyck, Obs. Bot. 6. 1822. 
chinocactus pruinosus Otto; Pfeiff. Enum. Cact. 54, 1837. 
Cereus pruinosus Otto; Férst. Handb. Cact. 398. 1846. 
Cereus clavatus Otto & Dietr. Allg. Gartenz. 6: 28. 1838. 
Cereus laevigatus Salm-Dyck, Cact. Hort. Dyck. ed. 2. 204. 1850. 
Type Locaity: South America. 
DistripuTion: Mexico to Venezuela. 
EXPLANATION OF PLATE LXVII.—From a photograph taken by Mr. G. N. Collins. Scale about 2. 
Lemaireocereus gummosus (Engelm. ). 
Cereus gummosus Engelm.; Brandegee, Proc. Cal. Acad. IT. 2: 162, 1889. 
TYPE LocaLity: Southern Lower California. 
Distrrpution: Lower California. 
Lemaireocereus hystrix (Salm-Dyck). 
Cactus hystrix Salm-Dvck, Obs. Bot. 7. 1822. 
Cereus hystrix Salm-Dyck; DC. Prod. 3: 464. 1828, 
DistriputTion: Jamaica; Haiti; Cuba. 
Ittustration: Journ. N. Y. Bot. Gard. 10: f. 20. 
Lemaireocereus hollianus (Weber). 
Cereus hollianus Weber; Coult. Contr. Nat. Herb. 3: 411. 1896. 
Cereus bavosus Weber; Schum. Gesamtb. Kakteen 84. 1899, 
Type Locauity: Tehuacin, Puebla, Mexico. 
DistrrBution: Puebla. 
Lemaireocereus mixtecensis (Purpus). Puate LXVIIL. 
Cereus mixtecensis Parpus, Monatssch. Kakteenk. 19: 52. 1908. 
Tyre Locauity: Sierra de Mixteca, Oaxaca, Mexico, 
Disrripution: Puebla and Oaxaca, Mexico. 
_Itxustration: Purpus loc. cit. 53. 
This species is perhaps nearest Lemaireocereus stellatus. 
EXPLANATION OF PLATE LXVIII.—From a photograph taken by Dr. D. T. MacDougal. 
Lemaireocereus schumanni ( Mathsson). 
Cereus schumanni Mathsson; Schum. Monatssch. Kakteen 9: 131. 1899. 
Type Locatity: Honduras. 
Disrrisution: Known only in cultivation. 
