﻿128 



BOTANICAL GAZETTE 



interlock with open mesh of stem surface or covering; in fig. 24 one gill has 

 slightly withdrawn; X300. 



Fig. 25— Portion of section from nearly mature basidiocarp showing 

 attachment (below) of gill margins to stem; X3S- 



Figs. 26-45.— Coprinus alramenlarius. 



Fig. 26— Slightly oblique section through stem and pileus at stage of young 

 hymenophore palisade, showing weak general annular gill cavity on each side; 

 blematogen very distinctly marked off from pileus; in this basidiocarp surface 

 of young hymenophore rises at oblique angle from axis of stem; X4°- 



Fig. 27. — Median longitudinal section showing weak general annular 

 gill cavity; p, pileus; b, blematogen; X70. 



Fig. 28.— Tangential section of same, showing gill origins on this side of 

 plant; X70. 



Fig. 29— Same plant, but section on other side of stem where hymeno- 

 phore is younger and in palisade stage ; note weak gill cavity; X7°- 



Fig. 30— Same but tangential section through surface of stem; X70. 



Fig. 31.— Same plant; section entirely tangential, showing hymenophore 

 palisade at left, and very slight gill origins at right; X 7°- 



Fig. 32.— Same section more highly magnified; X 115. 



Fig. 33. — Tangential section of younger basidiocarp, showing weak general 

 annular gill cavity with shredded fundamental plectenchyma, some hyphae 

 extending across to young hymenophore palisade; X 700. 



Fig. 34.— Portion at left of fig. 32 more highly magnified to show details 

 of palisade layer, etc.; note the three very slight salients, fundaments of 

 lamellae arising by pushing down of palisade cells by elongation of subadjacent 

 trama hyphae; note weak general gill cavity and loose threads of torn funda- 

 mental plectenchyma extending across indefinitely to young palisade salients 

 and to palisade portions between them ; X 400. 



Fig. 35.— Portion of same still more highly magnified, showing single 

 palisade gill salient with even palisade portion of young hymenophore on either 

 side; X700. 



Fig. 36— Section slightly oblique to axis of stem, but tangential and 

 perpendicular to surface of young hymenophore which rises at angle (as in 

 fig. 26), but more highly magnified; note weak gill cavity and shredded funda- 

 mental plectenchyma; X105. 



Fig. 37— Another section of same basidiocarp, but close to stem, showing 

 slight gill salients (over middle portion) which are very broad, as origins extend 

 part way down on stem as in species with adnate or adnexed gills; X 105. 



Fig. 38.— Tangential section, but parallel with axis of stem, showing 

 margins of gills beginning attachment to stem; note distinctness of pileus and 

 blematogen zones; X40. 



Fig. 30— Tangential section close to stem; middle lamellae well attached 

 to stem, because space in angle between pileus and stem is less than at greater 



