OSMOTIC CONCENTRATION OF TISSUE FLUIDS 
279 
The ravines of the leeward slopes are physiographically similar 
to those of the windward slopes. Both exhibit a forest covering of 
irregular canopy of larger trees with rich undergrowth of shrubs. 
The conspicuous difference between the two is chiefly found in the 
relative scarcity of epiphytes, both Orchidaceae and Bromeliaceae, 
and particularly of the most hygrophilous of the pteridophytes and 
the practical absence of tree ferns in the leeward ravines. 
Ligneous Plants _ 
Acalypha virgata L. A = 0.87, P = 10.5 
Feb. II, A = 0.78, P = 9.4; Mar. 11, A = 0.85, P = 10.2; Mar. 18, A = 0.98, 
P = II. 8. 
Acnistus arhorescens (L.) Schlecht. Mar. 11, A = 0.85, P = 10.2 
Besleria lutea L. A = 0.74, P = 8.8 
Feb. II, A = 0.65, P = 7.8; Feb. 26, A = 0.69, P ^ 8.3; Mar. 11, A = 0.85, 
P = 10.2; Mar. 18, A = 0.75, P = 9.0. _ _ 
Bocconia frutescens L. A = 0.79, P = 9.5 
Feb. II, A = 0.75, P = 9.0; Mar. 11, A = 0.83, P = 10. o. 
Young leaves taken in the collection of Feb. 11 gave values only slightly 
lower than those from mature organs, i. e., A = 0.72, P = 8.6. 
Boehmeria caudata Sw. Mar. 11, A = 0.86, P = 10.3 
Brunfelsia jamaicensis Griseb. A = 0.79, P = 9.4 
Feb. II, A = 0.78, P = 9.3; Mar. 18, A = 0.79, P = 9.5. _ 
Cestrum hirtum Sw. A = 0.73, P = 8.8 
Feb. II, A = 0.74, P = 8.9; Mar. 18, A = 0.72, P = 8.7._ 
Cinchona Sp. A = 0.92, P = ii.i 
Feb. II, A = 0.97, P = II. 6; Mar. 18, A = 0.87, P = loj. 
Clihadium terebinthinaceum (Sw.) DC. A = 0.82, P = 9.9 
Feb. II, A = 0.72, P = 8.6; Feb. 26, A = 0.89, P = 10.7; Mar. 11, A = 0.86, 
P = 10.4. _ _ 
Dendropanax arboreum (L.) Dec. &P1. A = i.ii,P = 13.3 
Feb. II, A = I. II, P = 13.3; Mar. 18, A = i.io, P = 13^. _ 
Duranta repens L. A = 1.33, P = 16.0 
Feb. II, A = 1.20, P = 14.4; Mar. 18, A = 1.45, P = 17^. _ 
Eupatorium glandulosum H.B.K. A = o,64,P=7.7 
Feb. 26, A 0.64, P = 7.7; Mar. 11, A = 0.64, P = 7.6. 
Eupatorium riparium Regel A = 0.78, P = 9.3 
Mar. II, A = 0.77, P = 9.2; Mar. 18, A = 0.78, P = 9.4._ _ 
Fuchsia corymbiflora R. & P. A = 0.67, P = 8.1 
Mar. II, A = 0.73, P = 8.8; Mar. 11, A = 0.70, P = 8.5; Mar. 18, A = 0.57, 
P = 6.9. 
Garrya Fadyenii Hook. Feb. 26, A = 2,23, P = 26.8 
Gesneria alpina Urban Mar. 11, A = 0.52, P = 6.3 
Guarea Swartzii DC. A = 0.90, P = 10,9 
Mar. II, A = 0.79, P = 9.6; Mar. 18, A = 1.02, P = 12.3; Mar. 18, A = 0.90, 
P = 10.8. 
