FIG. 19. Typical forms of basidia in the Basidiomycetes. i, basidia 

 and spores of Tulostoma mammosum : the basidia are elongated, and the 

 spores grow along its length as in the Hemibasidiomycetes, but the 

 basidium is not septate. 2, bisporous basidium of Dacryomyces deliques- 

 cens. 3, basidia and fusiform cystidia having the upper portion covered 

 with particles of oxalate of lime, of Peniophora inconspicua. 4, bisporous 

 basidia of Lycoperdon echinatum. 5, two spores of same showing the 

 persistent sterigmata. 6, tetrasporous basidia with sessile spores, of 

 Scleroderma vulgare. 7, portion of hymenium of a typical agaric, Inocybe 

 asterospora, showing tetrasporous basidia ; paraphyses, somewhat smaller 

 than the basidia, and not bearing sterigmata ; cystidia, longer than the 

 basidia. In many species of Inocybe, like the present one, the cystidia, 

 when mature, are crowned by an amorphous mass, resembling a cluster of 

 dark-coloured crystals. This is caused by the exudation and hardening 

 of the contents of the cystidium. 8, free spore of No. 7. All highly 

 mag. 



