BRITTON: FLORA OF THE VIRGIN ISLANDS 73 



Rocky slopes and cliffs, Buck Island and Flat Cays, St. Thomas; St. 

 Jan and Little St. James Island, St. Jan. 



Opuntia rubescens Salm-Dyck. [0. catacantha Link & Otto; 

 0. spinosissima and tuherculata of Eggers.] Coastal hills, St. Thomas; 

 St. Jan; St. Croix. The spineless or nearly spineless race is com- 

 monly planted for interest, and occurs wild on Little St. James Island, 

 St. Jan, and on Culebra. 



Opuntia repens Bello. [Cachis curassavicus of West; 0. ciiras- 

 savica of Eggers and of Millspaugh.] Dry fields and hillsides, St, 

 Thomas; St. Jan; St. Croix. 



Opuntia antillana Britton & Rose, spec. nov. 



Plant depressed, ascending or nearly prostrate, often forming 

 clumps I m. broad, seldom more than 4 dm. high. Joints obovate or 

 oblong-obovate, 2 dm. long or less, green, glabrous, readily detached; 

 leaves conic-subulate, 2-3 mm. long; areoles large, 2-3 cm. apart, 

 brown-woolly; spines mostly 3-6 at each areole, subulate, rather stout, 

 terete, 1-6 cm. long, yellow fading gray or nearly white; glochids 

 many, yellow; flowers about 7 cm. broad; petals obtuse, bright 

 yellew or fading reddish; fruit red-purple, about 4 cm. long. 



Rocky and sandy soil, St. Thomas, St. Croix, also on Tortola, Porto 

 Rico, Hispaniola, and St. Kitts. Type specimen collected on St. Kitts 

 {Rose, Fitch & Russell 3230). 



Opuntia Dillenii (Ker.) Haw. [Cactus Dillenii Ker.; Cactus 

 Opuntia of West; 0. Tuna of Eggers and of Millspaugh; 0. horrida 

 Salm-Dyck.] Banks, fields and hills, St. Thomas; St. Jan; St. Croix. 

 A hybrid with 0. rubescens was observed on Buck Island, St. Thomas. 



Opuntia triacantha (Willd.) DC. [Cactus triacanthus Willd.] 

 Coastal rocks. Buck Island, St. Thomas. 



Nopalea cochenillifera (L.) Salm-Dyck. [Cactus cochenillifer 

 L.; Opuntia coccinellifera Mill.] Persistent or spontaneous after 

 cultivation ; recorded by Eggers as occurring on limestone, St. Thomas; 

 St. Croix. 



Pereskia Pereskia (L.) Karst. [Cactus Pereskia L.; P. aculeata 

 Mill.] Spontaneous after cultivation, St. Thomas; St. Croix. 



Pereskia grandifolia Haw. [P. Bleo of Eggers and of Mills- 

 paugh.] Spontaneous after cultivation, St. Thomas; St. Croix. 



Cereus Northumberlandia Lambert. [C. lepidotus Salm- 

 Dyck.] Planted, St. Croix. 



Cereus hexagonus (L.) Mill. [C. peruvianus (L.) Mill.] Planted 

 (according to Eggers). 



Other species of Cacti are occasionally cultivated for interest. 



