﻿BOTANICAL GAZETTE 



2 3456 



centrifugally. The origin of the lamellae begins on the earlier or 

 older portions of the palisade layer of the young hymenophore, 

 and likewise proceeds in a centrifugal 

 direction. 



Since the lamellae thus originate 

 at some little distance from the stem, 

 on the lower surface of the roof of 

 a well denned and relatively large 

 annular gill cavity, their origin is 

 determined with comparative ease. 

 In the majority of the fruit bodies 

 examined at the time of the origin of 

 the lamellae, the area over which the 

 first portion of the palisade layer 

 extends and where the first salients, or 

 fundaments, of the lamellae appear, is 

 slightly convex and stands out nearly 

 or quite perpendicular to the axis of 

 the stipe. Sections parallel with the 

 axis of the stipe, but tangential 

 through this area, on either side of 

 the stipe, cut the lamellae fundaments 

 transversely and parallel with their, 

 at this time, downward direction of 

 growth (see diagram II, which illus- 

 trates the position of the sections). 

 As the sections approach the stem on 

 the near side, they gradually pass 



through < 



og. i 5 , srcuons w j, 4, or 5 surroundmg the stem Through this 



would show cross-cuts of young 5 ° 



lamellae at middle (see figs. 13, held the sections show a middle area 

 14); sections at 6 would show devoid of the salients. In passing 



primtlkrareaT'each^lde (see thr ° U S h the Stem a sterile area is 



fig. 12). a ar a ea ° sl ° see presented on either side of the stem, 

 but the origin of the lamellae is not 

 so clearly observed here as in completely tangential sections, since 

 the salients are cut in a strongly oblique direction, or parallel 



