326 BOTANICAL GAZETTE [ocTOBER 
the winter; and as they are coriaceous in texture and more or 
less coated with felt on the under surface, they remain intact until 
the time for the new foliage. The low summer rate (as compared, 
for example, with the long-leaved pine rate) also may have a 
relation to the fact that. although there is an absence of shrubs 
or undergrowth of importance, these trees are dwarfed or scrub- 
like, and the foliage grows low on the trunks; when growing 
closely they make a thicket-like forest. 
Seb. | Oct | Mov.| Dec | Jan.| Feb.| Mar-| Abr. | May |Tune | July | Qug 
‘ad aa ' 
2 IN oS : ee |? £ \ F. \ . 
wp7ai~ . ER OR / Ne Ps! 
Fic. 2.—Chart showing comparison of average yearly rates of evaporation in 
scrub oak forest (heavy line); flatwoods (broken line); long-leaved pines on dry lan 
(dotted line). 
Station no. 6, in the dry pine wood, gave the average evaporation 
per day of 17.9 cc.; 12.28 cc. for the period January to May; 
18.25 cc. for the summer period; 19.2 cc. for the winter period; 
with minimum monthly average of 8.9 cc. in December and a 
maximum of 32.5 cc.in April. The actual minimum was 4.15 CC. 
and the maximum 56.19 cc., showing the widest range of any 
station (fig. 2). 
