422 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Pachycereus orcuttii (K. Brandegee). 
Cereus orcuttii K. Brandegee, Zoe 5: 3. 1900. 
Type LocaLity: Rosario, Lower California. 
Distrisution: Known only from the type locality. 
Pachycereus pringlei (8. Wats. ). 
Cereus pringlei S. Wats. Proc. Am. Acad. 20: 368. 1885. 
Type LocaLity: ‘‘South of the Altar River,’’ Sonora, Mexico. 
DistriputTion: Sonora and northeastern Lower California. 
ILLusrration: Ann. Rep. Mo. Bot. Gard. 16: pl. 7. 
Pachycereus pecten-aboriginum (Engelm.). 
Cereus pecten-aboriginum Engelm.; 8. Wats. Proc. Am. Acad. 21: 429. 1886. 
Typr Locauity: Hacienda San Miguel, Chihuahua. 
Distripution: Chihuahua and Sonora; southern Lower California. 
Iutusrration: Gard. & For. 7: f. 54. Contr. Nat. Herb. 5: pl. 57, 58, fo 82. 
Pachycereus queretarensis (Weber). 
Cereus queretarensis Weber; Mathsson, Monatssch. Kakteenk, 1: 28, 1891, 
Type Locauity: In Querétaro, Mexico, 
Distripution: Central Mexico. 
Pachycereus titan (Kngelm.). 
Cereus titan Engelm.; Coult. Contr. Nat. Herb. 3: 409, 1896. 
Typr LocaLity: From Cape San Lucas to San Quentin, Lower California. 
Disrripution: Southern Lower California. 
6. HARRISIA Britton, Bull. Torr. Club 35: 561. 1908. 
Night-flowering cacti with slender upright-branched cylindric stems, the branches 
fluted, with from 8 to 11 rounded ribs separated by shallow grooves bearing areoles 
at frequent intervals, each areole with several acicular spines; flowers borne at 
areoles near the ends of the branches, funnelform, large, with a cylindric sealy but 
spineless tube as long as the limb or longer; buds globose, ovoid or obovoid, densely 
scaly, the scales bearing long or short woolly hairs; sepals pink or greenish, linear- 
lanceolate; petals white; stamens shorter than the petals; style somewhat longer 
than the stamens; fruit globose to ovoid-globose, green to yellow, spineless but with 
deciduous scales, the corolla withering-persistent; seeds very numerous, small. 
Type species Cereus gracilis Mill. 
Harrisia eriophora (Pfeiff.) Britton, Bull. Torr. Club 35: 562. 1908. 
Cereus cubensis Zuce.; Seitz, Allg. Gartenz. 2: 244. 1834. 
Cereus eriophorus Pfeiff. Enum, Cact, 94, 1837. 
Type LocaLity: Cuba. 
DistrrBuTIon: Cuba, 
ILttustration: Pfeiff. & Otto, Abb. u. Beschr. Cact. pl. 22; Blithende Kakteen 
pl. 84. 
Harrisia brookii Britton, Bull. Torr. Club 35: 564, 1908. 
Type Locauity: Georgetown, Long Island, Bahamas. 
DistripuTion: Bahama Islands; Florida Keys. 
Harrisia fernowi Britton, Bull. Torr. Club 35: 562. 1908, 
Cereus pellucidus Griseb. Cat. Pl. Cub. 116. 1866, not Otto, 1837. 
Typr Locauity: Between Ric Grande and Rio Ubero in eastern Cuba. 
DistripuTion: Eastern Cuba. 
