46 



THE CACTACEAE. 



yellow or yellowish brown, with darker bases; upper areoles on one side of the plant with large 

 tufts of whitish wool 5 to 7 cm. long, often as long as the spines or longer; flowers greenish, 6 to 

 7 cm. long; tube obconic with a spreading limb, 6 to 7 cm. broad, slightly purple, a little glaucous; 

 scales on ovary and flower-tube few, small, acute; 

 inner perianth-segments waxy, rigid, white, 1.5 to 

 2 cm. long; style white; fruit depressed-globose, 

 about two-thirds as long as thick, about 4 cm. in 

 diameter. 





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Fig. 66. — Cephalocereus barbadensis. 



Type locality: Cave Cay, Exuma Chain, 

 Bahamas. 



Distribution: Bahamas; Cays of northern 

 Cuba. 



Figure 67 is from a photograph, taken by 

 Marshall A. Howe in 1907 on the island Mari- 

 guana, Bahamas; figure 68 represents the fruit 

 of the type specimen. 



27. Cephalocereus swartzii (Grisebach) Britton and 



Rose, Contr. U. S. Nat. Herb. 12: 420. 1909. FlG 6g 



Cereus swartzii Grisebach, F\. Brit. W. Ind. 301. i860. ' 9 



Fig. 67. — Cephalocereus millspaughi; 



-Fruit of Cephalocereus millspaughii. X0.7, 

 -Flower of Cephalocereus royenii. X0.7. 



Tall, 2 to 7 meters high, often simple ; branches obtuse at apex; ribs 10, obtuse, strongly indented 

 between the areoles; spines 8 to 10, or in young plants 20 or more from an areole, the longer ones 2.5 

 cm. long, slightly spreading; flowers pinkish to greenish yellow, sometimes borne on all the ribs, 

 usually near the tops of the branches, surrounded with masses of white hair and long bristles; 

 perianth 5 to 6 cm. long, the inner perianth-segments obtuse; fruit depressed-globose, 3 cm. in 

 diameter, perhaps larger. 



Type locality: Jamaica. 



Distribution: Southern side of Jamaica. 



Cephalocereus swartzii, which is confined to the dry southern portions of Jamaica, 

 has frequently been confused with Lemaireocereus hystrix, which is very commonly used as 

 a hedge plant along the country roads about Kingston. 



