OMPHALIA FLAVIDA 413 



(cheilocystidia, Fig. 208, B) along the edge of each gill. Each 

 basidium bears four spores, and the spores are minute, ovoid, 

 apiculate below, as a rule eguttulate, 5-6-5 X 2-5-3 jx. 



The upper end of the stipe expands obconically and to it are 

 attached the decurrent gills (Fig. 206, also Fig. 213, p. 424). The 



Fig. 209. — Omphalia flavida. Vertical section through the pileus- 

 flesh above the gills of a large expanded fruit-body grown on 

 a Bryophyllum leaf in a Petri dish : a, part of a layer of swollen 

 cells ; b, loose, netted, thin hyphae, terminating on the exterior 

 of the pileus in irregularly clavate, fimbriate cells c ; d, mucilage, 

 derived from the outer hyphal walls, filling the spaces between 

 the hyphae ; e, a clamp-connexion. Drawn by A. H. R. Duller 

 and Ruth Macrae. Magnification, 467. 



thin pileus-flesh above the gills consists below of two or three layers 

 of swollen elongated cells (Fig. 209, a) and above of slender netted 

 hyphae (6) terminating on the exterior of the pileus in irregularly 

 clavate, fimbriate cells (c). Between these loose hyphae and between 

 the clavate cells the spaces are filled, as in a stilbum-hea,d, with 

 mucilage (d) derived from the swollen outer cell-walls. 



The pileus-fiesh at the top of the stipe and below the umbilicate 



