334 



RESEARCHES ON FUNGI 



(5) paraphyses, e e, numerous non-protuberant rounded or oval 

 elements, more or less hidden by the enlarged tops of the basidia, 

 never bearing sterigmata or spores, and becoming larger and more 

 and more emptied of their protoplasmic contents with the gradual 

 exhaustion of the hymenium ; and (6) pleurocystidia, f, elements 



ABC 



FIG. 118. Stropharia semiglobata. Surface view of the hymenium : A, one day 

 after the opening of the pileus and beginning of spore-discharge ; B, two days 

 after ; and C, about eight days after, when spore-discharge has ceased, a, a 

 past-generation basidium (with four sterigmatic stumps) ; b, a present-genera- 

 tion basidium (bearing spores) ; c, a coming-generation basidium (heavily 

 shaded with dots) ; d, a future -generation basidium (lightly shaded with dots) ; 

 e, a paraphysis (unshaded) ; w, waste spores adhering to the hymenium ; /, 

 a cystidium. In A and B respectively the number of elements on the equal 

 areas is as follows : past-generation basidia, 10 and 20 ; present-generation 

 basidia, 6 and 6 ; coming -generation basidia, 5 and 4 ; future -generation 

 basidia, 23 and 10 ; paraphyses, about equal numbers. In C, all the basidia 

 now belong to past generations, and the paraphyses have become larger and 

 can therefore be more clearly distinguished. In A and B, only those para- 

 physes are drawn which could be clearly distinguished, the rest are omitted. 

 Magnification, 580. 



occurring singly (one shown in C), few in number, scattered irregu- 

 larly throughout the hymenium, with dense persistent contents, 

 differing from the basidia in never producing sterigmata and spores 

 and from both basidia and paraphyses by ending in a protuberant 

 peg-like point. Pleurocystidia, i.e. cystidia which are situated on 

 the sides of the gills, do not occur in Panaeolus campanulatus, so 

 that, in possessing these elements in this situation, Stropharia 

 semiglobata differs from that fungus and comes to have six classes 

 of hy menial elements instead of only five. 



