106 
colonies up to two feet across; its small yellowish flowers are 
inconspicuous. Inasmuch as we had searched the Jamaican 
thickets in vain for this interesting little plant, we were especially 
pleased to find it here, and a basketful of it was gleefully taken. 
The other cactus of particular interest is the gigantic Cereus nu- 
difforus known only from Cuba, a most extraordinary plant 
attaining tree-like dimensions and outline. A magnificent speci- 
men was found within a hundred feet of the first Mamillarias, 
Fic. 19. Cereus nudiflorus, Guantanamo Bay, Cuba, 
with a trunk two feet in diameter branching at four or five feet 
ove the base into several stout limbs, and these repeatedly 
eae into a round-topped plant about 35 feet high with 
a spread as great as its height, the ultimate 3-angled to 5-angled 
branches characteristically drooping. I was told that the plant 
attains even greater dimensions, its height sometimes being 50 feet 
ormore, It was just coming into bloom at the time of our visit, its 
