LEMAIREOCEREUS. 



The flowers of this species open at about 7 o'clock in the evening in Jamaica. The 

 style is exserted from the tip of the bud several days before the flower opens, but it 

 seems to be withdrawn before the flower is ready to expand. The flower-tube cuts off from 









FIG. 126. I.emaireocereus hystrix. 



the ovary as is done in Cereus, except that the style comes off with the perianth. Numerous 

 wasps visit the flowers to gather the nectar which oozes from the back of the scales on the 

 flower-tube. 



The plant is called Spanish dildos in Jamaica. On hillsides at the United States Naval 

 vStation, Guantanamo Bay, Cuba, this cactus occurs in great abundance, forming large 

 colonies, individual plants differing much in the length of their spines, which in some are all 

 less than i cm. long. 



Illustrations: Journ. N. Y. Bot. Gard. 10: f. 20, 

 as Cereus hystrix; Gard. Chron. II. 10 : 185. Li,j ; Mol- 

 lers Deutsche Gart. Zeit. 18:342,35 Cereus swartzii. 



Figure 126 is from a photograph taken by Mar- 

 shall A. Howe near Guantanamo Bay, Cuba, in 

 1909; figure 127 shows a flower collected by William 

 Harris in Jamaica and figure 128 a fruit from the 

 same source. 



Here is probably to be referred Descourtilz's 

 plate 419 (Fl. Med. Antill., vol. 6), which he sup- 

 posed to be Cactus firnbriatus Lamarck. This plate 

 seems to be based largely on Burmann's 

 plate of Plumier 195, f. 2. This latter 

 plate was made the type of Haworth's 

 Cereus grandispinus (Phil. Mag. 7: 113. 

 1830; Pilocereus grandispinus Lemaire, Rev. 

 Hort. 1862:427. 1862). 



3. Lemaireocereusgriseus(Haworth)Britton and 

 Rose, Contr. U. S. Nat. Herb. 12 : 425. 1909. 



Cereus griseus Haworth, Syn. PI. Succ. 182. 



1812. 



Cereus eburneus Salm-Dyck, Observ. Bot. 3: 6. 1822. 

 Cereus crenulatus griseus Salm-Dyck in Pfeiffer, Enum. Cact. 85. 1837. 

 Cereus eburneus polygonus Pfeiffer, Enum. Cact. 91. 1837. 

 Cereus resupinatus Salm-Dyck, Allg. Gartenz. 8: 10. 1840. 

 Cereus gladiger* Lemaire, Hort. Univ. 6: 60. 1845. 



FIG. 127. Flower of Lemaireocereus hystrix. 

 FIG. 128. Fruit of same. 



Xo. 7 . 



*At place cited, by error spelled gladiiger, which some have cited as gladilger, thus making another error. 



