286 J. ARTHUR HARRIS AND JOHN V. LAWRENCE 
Liabum umhellatum (L.) Sch. Bip. 
A = 0.58, P 
= 7.0 
Mar. 2, A = 0.53, P = 6.4; 
Mar. 4, A = 
= 0.60, P = 
= 7.2; Mar. 13, A 
= 0.62, 
P = 7-5. 
Lobelia assurgens L. 
A = 0.73, P 
= 8.7 
Feb. 13, A = 0.66, P = 8.0; 
: Mar. 2, A 
= 0.76, P 
= 9.1; Mar. 2, A 
= 0.76, 
P = 9.1. 
Panicum palmifolium Poir. 
A = 0.80, P 
= 9.6 
Feb. 4, A = 0.76, P =9.2; 
Feb. 22, A 
= 0.80, P 
= 9.7; Mar. 2, A 
= 0.83, 
P = 10. 0. 
Peperomia stellata (Sw.) A. Dietr. 
A = 0.42, P 
= 5-1 
Mar. 2, A = 0.42, P = 5.1; 
Mar. 4, A = 
= 0.41, P = 
= 4.9; Mar. 13, A 
= 043» 
P = 5-2. 
P^7ea 
Mar. 4, A = 0.65, P 
= 7.9 
Pilea grandifolia (L.) Blume 
A = 0.58, P 
= 7.0 
Feb. 13, A = 0.57, P = 6.8; 
Feb. 22, A 
= 0.59, P 
= 7.1. 
Pilea nigrescens Urban 
A = 0.57, P 
= 6.9 
Feb. 20, A = 0.56, P =6.7; 
Feb. 22, A 
= 0.51, P 
= 6.1 ; Feb. 24, A ■ 
= 0.55, 
P = 6.6; Mar. 2, A = 0.58, P = 6.9; M 
ar. 4, A = 
■■ 0.61, P = 7.4; M 
ar. 13, 
A = 0.61, P = 7.4. 
Prescottia stachyodes (Sw.) Lindl. 
A = 0.81, P 
= 9-7 
Feb. 24, A = 0.84, P = 10. 1 : 
; Mar. 4, A 
= 0.72, P 
= 8.6; Mar. 13, A 
= 0.87, 
P = 10.5. 
Seniles Zeugites (L.) Nash 
A = 0.62, P 
= 7.4 
Feb. 24, A = 0.59, P = 7.1; 
Mar. 4, A : 
= 0.64, P : 
= 7.8. 
in. Discussion of Results 
In analyzing these data we shall consider three main problems: 
A. The relationship between growth form and osmotic concentra- 
tion. 
B. The differentiation of the habitats of the Blue Mountains in 
osmotic concentration. 
C. The relative value of the osmotic concentration of the fluids of 
the plants of the Blue Mountain rain forest as compared with other 
phytogeographically different areas which have been investigated by 
similar methods. 
The only method by which these problems may be investigated is 
the statistical one, the comparison by means of averages of different 
sections of the data. 
The averages of species means (or of species determinations, when 
only one for a habitat is available) are given for herbaceous and 
ligneous plants separately, and for all plants, for each of the four 
habitats in Table I. 
