424 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Cereus ambiguus DC. loc. cit. 
Lechinocereus serpentinus Lem. Cact. 57. 1868. 
Tyre LocaLity: None given; described from garden plant. 
DistrrpuTion: Mexico. 
InLustrATions: Link & Otto, Ic. Pl. Select. pl. 42; Bonpl. loc. cit.; DC. Mem. Mus. 
Paris 17: pl. 12; Bot. Mag. 64: pl. 3566; Regel, Gartenfl. pl. 1079. 
Nyctocereus hirschtianus (Schum.). 
Cereus hirschtianus Schum. Gesamtb. Kakteen 130, 1899. 
Type Locaity: Nicaragua. 
DisrripuTion: Known only from the type locality. 
ILLUSTRATION: Gesamtb. Kakteen f. 37. 
Nyctocereus neumannii (Schum. ). 
Cereus neumannit Schum. Gesamtb, Kakteen Nachtr. 37. 1903. 
Type LocaLity: Near Chiquitillo, Metagalpa, Nicaragua. 
DisrrisutTion: Known onlv from the type locality. 
8. CARNEGIEA Britt. & Rose, Journ. N. Y. Bot. Gard. 9: 187. 1908. 
Usually very large plants with stout upright stems and few or no_ branches, 
strongly ribbed, the spines on flowering and sterile areoles very different; flowers 
borne on the uppermost areoles, diurnal, funnelform, thickish, the tube nearly 
cylindrical, about half as long as the limb, bearing a few broadly triangular, ovate, 
acute scales with tufts of wool in their axils; petals white, short, widely spreading 
and somewhat reflexed when fully expanded; ovary spineless or nearly so, oblong, 
covered with scales similar to those of the tube but somewhat closer together; 
stamens very numerous, about three-quarters as long as the petals; stigmas 12 to 18, 
narrowly linear, reaching a little above the stamens; fruit an oblong or somewhat 
obovoid berry containing red pulp and bearing small distinct scales; seeds very 
small, numerous, black, and shining. 
Type species Cereus giganteus Engelm. 
Carnegiea gigantea (Kngelm.) Britt. & Rose, Journ. N. Y. Bot. Gard. 9: 188. 1908. 
Cereus giganteus Engelm. in Emory, Notes Mil. Rec. 158. 1848. 
Pilocereus engelmannit Lem. Ill. Hortic. 9: mise, 97, 1862. 
Pilocereus giganteus Haage & Schmidt, Cat. 230. 1898. 
Tyre Locauity: Along the Gila River, Arizona. 
Disrripution: Arizona, southeastern California; Sonora, Mexico. 
IuLustrations: Cact. Mex. Bound. pl. 67,62; Bot. Mag. pl. 7222; Journ. N. Y. Bot. 
Gard. 9: pls. 49, 50. 
9. LEMAIREOCEREUS gen. nov. 
Plants usually very large, tall and branching or sometimes prostrate; spines usu- 
ally stout and numerous; flowers diurnal, single at the areoles, with a more or less 
elongated funnelform tube; stamens numerous, borne in many rows all along the 
surface of the throat; surface of ovary covered with fleshy tubercles, each crowned 
by a small bract; axils of the bracts filled with short hairs or dense wool, at first 
spineless but soon developing a cluster of spines; fruit globular to oval, beset with 
deciduous spines, in most species, at least, irregularly bursting when old, exposing 
the seeds, often edible; seeds many, black. 
Type species Cereus hollianus Weber. 
Lemaireocereus cumengei (Weber). 
Cereus cumenget Weber, Bull. Mus. Hist. Nat. Paris 1: 317. 1895, 
Type LocaLity: Lower California. 
DisrrisutTion: Lower California. 
