418 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
acutish, about as wide as high or a little wider; areoles 1 to 2 cm. apart; spines 
about 20, acicular, widely radiating, 1 to 2 cm. long, or at the flower-bearing (upper) 
areoles 3 to 7 cm. long, the old ones gray brown, the young ones yellow or yellow 
brown, with darker bases; upper areoles on one side of the plant with large tufts of 
whitish wool often as long as the spines or longer; flowers 6cm. long; fruit depressed- 
globose, about two-thirds as long as thick. 
Banamas: Cave Cay, Exuma Chain, February 19, 1905, Britton & Millspaugh 
2832, type; Conception Island, Britton & Millspaugh 6025; Watlings Island, 
Britton & Millspaugh 6112; Acklins Island, Brace 4300; Mariguana, Wilson 
7567; South Caicos, Wilson 7678; Little Inagua, Nash & Taylor 1195; Wilson 
7773. 
Cephalocereus monoclonos (DC.). 
Cereus monoclonos DC. Prod. 3: 464. 1828. 
Type Locauity: Caribbean Islands, 
ILLustrRaATION: Plumier, Pl. Am. ed. Burmann. pl. 191. 
Clearly a Cephalocereus without wool, and presumably from Santo Domingo. 
Cephalocereus nobilis (Haw. ). 
Cereus nobilis Haw. Syn. Pl. Succ. 179. 1812. 
Cactus strictus Willd. Enum. Suppl. 32. 1813, not C. strictus Haw. 1803. 
Cereus strictus DC. Prod. 3: 465. 1828. 
Pilocereus strictus Rimpl. Forst. Handb. Cact. ed. 2. 687. 1886, 
Pilocereus nobilis Schum. in Eng]. & Prantl, Pflanzenfam. 3°: 181, 1894, 
Cactus haworthit Spreng. Syst. 2: 495. 1825. 
Cereus haworthit DC. Prod. 3: 465, 1828. 
Pilocereus haworthii Console; Lem. Rey. Hortic. 1862: 428. 1862. 
Pilocereus consolei Lem. loc. cit. 427. 1862. 
Cereus curtisii Otto; Pfeiff. Enum. Cact. 81. 1837. 
Pilocereus curtisii Salm-Dyck, Cact. Hort. Dyck. ed. 2. 40. 1850, 
For additional synonymy see Schumann, Gesamtb. Kakteen 189. 
Type Locauity: ‘‘ West Indies.” 
Distrisution: St. Kitts to Grenada. 
ILLusTRATION: Bot. Mag. pl. 8125, as Cereus royeni. 
Cephalocereus palmeri Rose, sp. nov. 
Tree 2 to 6 meters high, with 20 or more branches (often 5 to 8 em. in diameter), 
dark green or glaucous and bluish when young; ribs 7 to 9, rounded on the edge, 
rather closely set, clothed from top downward for 20 to 20 em. with long white hairs 
(4 to 5 em, long) usually hiding the spines; radial spines 8 or 12, slender, yellow 
when young; central one much longer than the others, 2 to 3 cm. long; areoles 1 cm. 
apart, scarcely woolly except toward the top; flowers 6 cm. long, somewhat tubular, 
brownish, the ovary without spines or hairs; fruit globular, about 6 em. in diameter, 
naked but the surface somewhat warty; seeds black, shining, minutely pitted, 2 mm. 
long, oblique at base. 
Collected by Dr. E. Palmer near Victoria, Mexico, February, 1907 (no. 362, type), 
and near the same place by E. A. Nelson, March 15, 1902 (no. 6665). 
Type U.S. National Herbarium no. 572593. 
Living specimens, including seedlings, are now growing in Washington. 
It is called ‘‘organo,’’? a common name also for Cereus marginatus and other species 
of Cereus. 
Cephalocereus polygonus (Lam. ). 
Cactus polygonus Lam. Encyel. 1: 539. 1783. 
Cereus polygonus DC. Prod. 3: 466. 1828. 
Pilocereus plumieri Lem. Rev. Hortic. 1862: 427. 1862. 
