-76- 
oome with the gradual filling up of the valley through 
sedimentation, thus changing* the conditions under which 
flooding now ocours. The present successions along the 
valley of Carp River and Carp Lake aro of comparatively 
little moment; however they indicate the character of a 
portion of the hydruroh series which will eventually lead 
to a mesophytic climax covering the entire floor of the 
valley* 
The principal * ones of vegetation in connect¬ 
ion with the development of the maple climax on tho first 
range are shown in the diagram (fig* 47). The letters 
a, b, £, d, indicate the lines of succession. The line £ 
begins with lichens, mosses,and crevice plants at the bare 
summit, and culminates in the maple forest on the north 
elope; b originates largely from seeds washing over the N 
summit; £ represents a line of invasion on the talus slope 
from Ihe forest below; d is a broken line representing the 
discontinuous nature of the hydrarch succession from the 
valley of Carp River. Part of this succession leads to the 
mesophytic forest on the second range. 
