XEKOl'IIYTE SfX'lETIES 



191 



Fk;. lOii. The Epring 

 beauty {Ciayto/'da}, 

 showing subterranean 

 tuber-like stem sending leaf and flower-bearing 

 stern above the surface.— After Atkinson, 



turn of the moist season 

 these underground parts 

 develop new exposed 

 surfaces. In such cases 

 it nitty Ijc said tliat at 

 the coming of the droutli 

 the plant seeks a sub- 

 terranean retreat. 



A little less decrease 

 of C-xjiosed surface is 

 shown hy the deciduous 

 hiibit. It is known that 

 certain trees and slirubs, 

 whose Jjodies remain 

 exposed to the drouth, 

 shed their letives and 

 thus very greatly reduce 

 the amount of exposure ; 

 with the return of mois- 

 ture, new leaves are put 

 forth. It will he re- 

 marked, in this connec- 

 tion, that the same 

 habits serve just as well 

 to bridge over a period 

 of cold as a period of 

 drouth, and perhaps 

 they are more familiar 

 in connection with the 

 cold period than in con- 

 nection with the drouth 

 period. 



136. Temporary reduc- 

 tion of surface. — While 

 the habits above have to 

 do with regular drouth 



