U 
BOTANY OF THE CEYLON PATANAS. 311 
eastern hills which are sufficiently high to cool it below its 
saturation-point. Upon these hills is found a forest-vegetation 
of the same type as that which characterizes that zone of the 
western hills which lies between 4000 feet and 600) feet; and 
these developments of the western forest are isolated in a 
country which is almost uniformly covered with patana or park 
vegetation. The climatic conditions of Uva, during the S.W. 
monsoon, are thus Continental rather than Insular, and compare 
remarkably with those of the much larger area of the Brazilian 
Campos. Here the Trade-winds, striking against the coast- 
ranges of S. Brazil, lose so much of their moisture that they pass 
over the lower country to the west as dry, hot winds, depositing 
no more moisture until they strike against the slopes of the 
Andes, which bear a forest of the same type as is found upon the 
coast-ranges in the east. The comparatively low intermediate 
country is covered with savannah-vegetation (22). 
The rain-value of the S. W. monsoon decreases in an easterly 
direction from the central ridge, as is shown in the following 
table compiled from the returns of the Ceylon Meteorological 
Office and the Public Works Department. The table gives the 
amount of rain in inches and the number of rainy days, respec- 
tively, during the periods of the S.W. and N.E. monsoons. 
S.W. N.E. 
Eleva- Monsoon. Monsoon. 
Station, e Situation. m | e 
tion. | A 
< | p. ... |Average of 
Rain- | Rainy, Rain- | Rainy 5 
fall. | days. | fall. | days. 
Nuwara Eliya...|6240ft.. 
| 
1 mile W. of d 609 | 117 |3928| 85 |26,% years. 
| 
Central ridge. 
Central ridge. ) 
Bandarawela ...|380ft . 
18 miles S.E. gd 248 | 51 | 4081| 76 | 25 
Hakgala, 
15 miles N.E. of 
Bandarawela. . 
18 miles E. of 2509 | 30 
Hakgala. 
Hakgala ......... 958188. { “GAN ri l| 385 | 102 | 5205| 100 | 133 
Badulla ......... 2225ft. 5746| "1 | 21 » 
