BRITTON AND ROSE—CEREUS AND ITS ALLIES. 435 
Aporocactus flagelliformis (L.) Lem. Ill. Hortic. 7: misc. 68, 1860. 
Cactus flagelliformis L. Sp. Pl. 467. 1753. 
Cereus flagelliformis Mill. Gard, Dict. ed. 8. no. 12. 1768. 
Type Locauity: In South America. 
DistriputTion: Mexico. Reported from Jamaica, but not found there by recent 
collectors. 
IuLusrrations: Trew, Pl. Ehret. pl. 30; Bot. Mag. 1: pl. 17. DC. Pl. Grass. pl. 
127; Baill. Hist. Pl. 9: f. 52, 58. 
Aporocactus flagriformis (Zucc.) Lem. 
Cereus flagriformis Zuce. Cat. Cact. Monac. 1836. 
Type LocaLity: San Jose de l’Oro, Oaxaca. 
Distripution: Mexico, 
Intusrration: Pfeiff. & Otto, Abb. u. Besch. 1: pl. 12. 
Aporocactus leptophis (DC. ). 
Cereus leptophis DC. Mem. Mus. Paris 17: 117. 1828. 
Cereus flagelliformis leptophis Schum. Gesamtb. Kakteen 143. 1899. 
Type Locauity: ‘In Mexico.” 
Distrinution: Mexico. 
InLustration: DC, Mem. Cact. pl. 12. 
22. BERGEROCACTUS gen. nov. 
A low, much-branched, day-blooming cactus, with spreading or ascending stout, 
cylindric, low-ribbed stems and branches, the areoles close together, bearing many 
yellow acicular radiating spines, those of contiguous areoles interlocking, one spine 
usually much longer than the others; corolla short-funnelform, greenish yellow, the 
rather widely expanding limb as long as the tube or longer; ovary densely covered 
with areoles bearing short brownish wool and acicular spines; corolla tube with a 
few similar distant areoles; sepals narrowly obovate, obtuse; petals obtuse, little 
longer than the stamens; style, including the linear stigmas, about as long as the 
stamens; fruit globose, densely spiny; seeds obovate. 
Type species Cereus emoryi Kngelm. 
Bergerocereus emoryi (Engelm.). 
Cereus emoryi Engelm, Am. Journ, Sci. II. 14: 338. 1852. 
Echinocereus emoryi Rimpl. Forst. Handb. Cact. ed. 2. 804. 1886. 
Type Locauiry: ‘‘About the boundary line’”’ of California and Lower California. 
Distrisution: Southern California and Lower California. 
Intusrration: Engelm. Cact. Mex. Bound. pl. 60. f. 1-4. 
23. ECHINOCEREUS Engelm. in Wisliz. Mem. Tour North. Mex. 91. 1848. 
Always low plants, erect or prostrate, single or cespitose, globular to shortly 
cylindric; spines on flowering and sterile areoles similar; flower large, diurnal; 
corolla short-funnelform, scarlet or purple, rarely yellow, the tube and ovary spiny; 
stigmas always green; seeds black, tuberculate. 
Type species Echinocereus viridiflorus. 
Professor Schumann recognizes 38 species in this genus, but more than 125 species 
and varieties have been proposed. The species of this genus will be treated in a later 
publication. 
SPECIES OF UNKNOWN GENERIC RELATIONSHIP. 
Cereus aragoni Weber, Bull. Mus. Hist. Nat. 8: 456. 1902. 
Type Locauity: In Costa Rica. 
DistrisutTion: Costa Rica, Central America. 
Ovary and fruit scaly. As indicated by Berger, perhaps a Lemaireocereus. 
