OSMOTIC CONCENTRATION OF TISSUE FLUIDS 
281 
Seniles Zeugites (L.) Nash Feb. 26, A = 0.69, P = 8.4 
Stenorrhynrhus speciosus (Jacq.) L.C. Rich. A = 0.52, P = 6.3 
Feb. II, A = 0.54, P = 6.5; Mar. 11, A = 0.48, P = 5.8; Mar. 18, A = 0.54, 
P = 6.5. 
Tradescantia multiflora Sw. Mar. 11, A = 0.39, P = 4.7 
III. The Ridge Forest 
The ridge forest, closely confined to the main ridge of the mountains 
and to narrow strips along the crests of the water divides on both 
windward and leeward slopes, is far more open than that of the 
slopes or ravines. The vegetation is, therefore, not only more exposed 
to the influence of light, but is much more wind swept than that of 
the more deeply and densely covered slopes and ravines. This habitat 
is, therefore, "relatively xerophilous in the entire make up of its 
vegetation." 
The following are the results : 
Ligneous Plants 
Acalypha virgata L. A = 0.92, P = ii.i 
Feb. 9, A = 0.86, P = 10.3; Mar. 9, A = 0.96, P = 11.6; Mar. 16, A = 0.95, 
P - 11.4. 
Acnistus arborescens (L.) Schlecht. Mar. 16, A = 0.97, P = 11,7 
Actinophyllum Sciadophyllum (Sw.) R. C. Schneider Mar. 9, A = 1.24, P = 15.0 
Alchornea latifolia Sw. Mar. 4, A = 0.89, P = 10.8 
Brunfelsia jamaicensis Griseb. A = 0.83, P = 10. o 
Mar. 9, A = 0.80, P = 9.6; Mar. 9, A = 0.90, P = 10.8; Mar. 16, A = 0.80, 
P = 9.6. 
Cestrum hirtum Sw. Mar. 16, A = 0.83, P = 10. o 
Cinchona sp. A = 1.02, P = 12.3 
Feb. 20, A = 1.06, P = 12.7; Mar. 4, A = 0.96, P = 11.6; Mar. 16, A = 1.05, 
P = 12.6. _ _ 
Citharexylum caudatum L. A = 1.92, P = 23.1 
Feb. 9, A = 1.95, P = 23.4; Mar. 9, A = 2.05, P = 24.6; Mar. 9, A = 1.77, 
P = 21.3. 
Clethra occidentalis (L.) Steud. A = 0.73, P = 8.8 
Feb. 9, A = 0.77, P = 9.3; Mar. 16, A = 0.68, P = 8.2. 
Clusia havetioides (Griseb.) Tr. & PI. Feb. 18, A = 0.79, P = 9.5 
Cyrilla racemiflora L. Feb. 17, A = 1.18, P = 14,2 
To avoid increasing unduly the number of habitats this determination based 
on material from John Crow Peak has been included in the Ridge Series. 
Dendropanax sp. Feb. 9, A = i.oo, P = 12.0 
Dendropanax nutans (Sw.) Dec. & PI. A = 0.93, P = 11.2 
Mar. 9, A = 0.98, P = 11. 8; Mar. 16, A = 0.87, P = 10.5. 
