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elevation. The hills of the northern and southern ranges are 
densely wooded. 
The climate is tropical and two seasons are evident, one a 
dry season from January to the middle of May, with an average 
rainfall of 3 inches per month, and the other a wet season from 
June to December, with an average rainfall of 8 inches per 
month. A short dry season of four weeks, called ‘Indian sum- 
mer,” occurs in October. The mean annual rainfall is 63.22 
inches, although that of 1921 reached 85.13 inches. The coolest 
period is from December to April. The average temperature is 
80° F., the mean diurnal temperature being 84° F., the mean 
nocturnal 74° F. 
Three mosses, representing three families, were collected 
near Sangre Grande. Leucobryum martianum (Hornsch.) Hampe 
and Calymperes donnellit Austin were found thriving on a sand- 
gravel bank while Rhaphidorrhynchium subsimplex (Hedw.) 
Brotherus grew both on the bank and on several dead logs in the 
vicinity. The latter is apparently a very common moss here, and 
of South American affinity. The writer collected it abundantly 
in the rain-forest of British Guiana. 
Near Blue Basin we visited a cacao grove where cacao, 
Theobroma cacao L. and coffee, Coffea arabica L. were being cul- 
tivated. On the floor of the cacao grove, where there was con- 
siderable shade and comparatively few plants, the ferns Dry- 
opteris poiteana (Bory) Urban and Dryopteris tetragona (Sw.) 
Urban seemed very much at home. With the ferns occurred 
Amaranthus spinosus L., a species of eastern United States, 
which seemed strangely out of place. On the branches of the 
trees in the grove Polypodium incanum (Sw.) and Polypodium 
lycopodioides L. were densely matted, in some instances com- 
pletely covering the limbs. Other ferns frequently noted were 
Pityrogramma calomelanos L., the “Silver fern,” so called be- 
cause of the white powder on the under side of the fruiting 
frond; Dryopteris parasitica O. Ktze., which was collected in the 
gutter along the road; and Alsophila microdonta Desv., an 
enormous fern over 10 feet in height which also was collected in 
the Guiana rain-forest. Near Blue Basin a specimen of Jum- 
perus lucayana Britton was found. It has been introduced, how- 
ever, as there are no native conifers on the island. The striking 
lobelia, Centropogon cornutus (L.) Druce, which was also foun 
