﻿BOTANICAL GAZETTE 



far side of the stem; fig. 13 is from a section just before passing from 

 the area of salients to the palisade area; while fig. 12 is through the 

 palisade layer beyond the gill salients. At either extremity of the 

 series of salients in figs. 13 and 14, and on the left of fig. 16, it can be 

 seen that the folds become less and less marked, finally presenting, 

 as it were, only very slight undulations of the surface in the 

 transition to the palisade area. 

 These slight undulations, or 

 salients, shown at the extreme 

 ends of the series, are the distal 

 ends of the lamellae fundaments. 

 Tangential sections through a 

 series of such radial salients 

 which diverge slightly from a 

 common center, and traveling 

 from the stem toward the 

 margin of the pileus, would pass 

 through the distal ends of the 

 salients on either side of the 

 middle area before the ends of 

 those over the middle area were 

 reached (see diagram III). 

 And, since the development of 

 the pileus and the successive 

 phases of the hymenophore are 

 radial and centrifugal, the very 

 low salients, or " undulations,' 1 

 are the very earliest stages in 

 the origin of the lamellae funda- 

 ments. Fig. 16 is somewhat 

 more highly magnified in order 

 to bring out more distinctly the transition from the plain palisade 

 phase of the hymenophore through the phase of weak salients to 

 the more pronounced fundaments of the lamellae. 



In some basidiocarps, at the time of the origin of the lamellae, 

 or just prior thereto, the young hymenophore is relatively farther 

 from the stem, and the plane of its surface, or rather a plane tangent 



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itrifugal t 



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