64 TlilNIDAD AND TOBAGO BULLETIN. [XIX. 2. 



and Carenage, and also as an isolated colony on San Fernando Hill. 

 Seedlings from specimens planted at St. Joseph have taken hold on 

 the branches of Sanmn trees there in a very interesting manner, 

 some of them now as much as eight feet high, the seeds evidently 

 transported by birds which feed on the fruit of this cactus and of 

 others. The species ranges in northern South America from the 

 Ouianas to Colombia and is widely planted in tlie ^Vest Indies and 

 also in warm and tropical regions elsewhere. 



6. Cephalocereus Moritzianus (Ouo) Briiton and Rose. 



Moritz's Cephalocereus is an erect, leafless, rather stout cactus, 

 sometimes thirty feet high, with columnar stems and branches. Its 

 branches are nearly upright or somewhat ascending, often numerous, 

 but plants growing in poor rocky soil are often unbranched : its joints 

 are long, light green to rather dark green, from about two inches to about 

 four inches in diameter with from seven to ten rather blunt ribs, with 

 felted, spiny areolos half an inch apart or less, those of young joints 

 bearing long white wool ; the spines are from eight to about tv.'elve in 

 number, brownish, acicular, half an inch to an inch and a half long. 

 The flowers which appear singly, for tlie most part at areoles on one side 

 of the young joints near tlie top, are narrowly campanulate, greenish- 

 purple without, from two inches to nearly three inches long, their outer 

 segments rounded, the inner white and obtuse ; the stamens are very 

 numerous and shorter than the corolla; the style is slender and about 

 ivs long as the corolla; the ovary is smooth, more or less enclosed in 

 the white wool of the areoles. Its fruit is a depressed-globose, red- 

 purple, smooth berry, two inches or somewhat loss in diameter, 

 containing many small black seeds. 



This cactus grows on hills and clift's at points on the north-western 

 Trinidad mainland from Point Gourde to the )3oca de Monos and is 

 frequent on Gasparee, Monos, Huevos, Chacachacare and I'atos Islands ; 

 also on the northern coast of Venezuela ; perhaps also on Tobago. We 

 observed and studied a very large barren colony on Chacachacare near 

 La Tinta Bay in April, and found a few fruits on Patos ; specimens 

 brought to New York flowered promptly in a greenhouse at the New 

 York Botanical Garden. 



7. Cephalocereus Smithiaiius Uiitton and Ru.se. 



Major Smith's Cephalocereus is a slender and weak-stemmed, rather 

 <lark green, leafless cactus, simple or branched, sometimes fifteen feet 

 long, often clambering, the branches from an inch to two inches tliick, 

 with about 9 low ribs. The areoles are close together, white-felted, but 

 without any wool, and bear about twelve acicular spines, the central ones 

 of old joints nearly two inches long, the radial ones much shorter, 

 whitish when young, dark brown or blackish when old. The Howers 

 are about three mches long, funnelform-campanulate, the somewhat 

 curved tube bearing a few scales, the inner perianth -segments white. 

 The red smooth ovoid fruit is about an inch and a half in diameter. 



This plant is abundant along the path to the flag-pole on Patos 

 Island, where I studied it in the company of Mr. Freeman and Professor 

 Hazen, March 13, 1920, at which time we could find no ful'y developed 



