t 



191 7] GAXO— ECOLOGY OF FLORIDA 369 



a dense undergrowth, that of the pine woods being if anything 

 denser than that of the oak forest; indeed, the pine forest is well on 

 its way toward the oak stage. However, there is a difference when 

 the winter and the summer averages are considered. Estimated 

 for the period from June to November, the season during which 

 full foliage of deciduous trees is a large factor, the daily rate for the 

 oaks is 12 .49 cc. and for the pines 13 .8 cc. In winter (November 

 to June), from the time when the oaks are leafless until they attain 

 full summer foliage, the rates are 15 .69 cc. daily for the oaks and 

 13 .70 cc. for the pines. In the beech woods during these seasons, 

 the rates are 13.4CC. daily for the summer and 17.8 cc. daily for 

 winter, thus showing an approximation to the pines in summer and 

 greater evaporation than either pines or oaks in winter. 



The scrub oaks and long-leaved pines behave differently. 

 These oaks average 13 .95 cc. for summer (comparable to the short- 

 leaved pines and the open beech woods) and 14. 1 cc. for winter; 

 while the long-leaved pines on dry sand show the highest rates, 

 18.25 cc. for summer and 19.2 cc. daily for winter. The scrub 

 oaks and the long-leaved pines have respectively 15.52 cc. and 

 9 cc. daily average for a period of 18 consecutive months. The 

 scrub oak forest shows less actual variation than any other except 

 the flatwoods, this probably being related to the stunted character 

 of the oaks, their close thicket-like growth, and their habit of 

 retaining the dead leaves most of the winter or until fresh growth 

 starts. In striking contrast, the long-leaved pine forest shows 

 the most extreme variations in range of evaporation of any other 

 station. 



*7 



The contrast between the two long-leaved pine associations is 



greatest 



rate throughout the year than any other and averages 12.99 cc. 

 daily for the 18 months, thus taking the place next in order to the 

 mesophytic climax forest. The summer evaporation for the flat- 

 woods averages 13 . 24 cc. daily, comparable to that of the scrub 

 oaks and the pastured beech wood. The average winter rate is 

 1 . 17 cc. daily, being the lowest, and this is the case although this 



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