SPOEES AND THALLIDIA. 



21 



as the case may be. Aspergillus niger (see fig. 193* and 193^), a Mould living 

 chiefly on the juices of fresh or preserved fruits, develops slender upright hyphse 

 with swollen ends, which bear numbers of short peg-like processes — the sterig- 

 mata — from which moniliform series of from five to eight spores are abjointed in 



Fig. 195. — Basidiomycetes. 



^ Clavaria OAirea. ^ Bcedalea guercina. ^ Marasmius tenerrimus. * MarasTnius per/oratis. ^ Craterellus clavatus. ^Amanita 

 phalloides. ^ Clavate basidia with filamentous sterigmata, from the ends of which spherical spores are abjointed (from the 

 hymenium of Amanita phalloides). 8 EydTmvm rnibricatutn. s Polyporvs perennis. i, ^, s, *, ^, 6, 8^ 9 natural size; 

 »x250. 



rapid succession. These spores at first hang loosely together, and are arranged 

 like strings of pearls, but collectively these rows of spores form a spherical head. 

 A shock of any kind, especially the disturbance occasioned by currents of air, will 

 cause a severance of the spores, and the entire sphere consequently falls to pieces. 



