SPORES AND THALLIDIA. 



21 



as the case may be. Aspergillus niger (see fig. 193* and 193 6 ), 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 aurea. * Dcedalea quercina. Marasmius tenerrimus. * Marasmius perf or ans. Craterellus clavatus. * Amanita 

 phalloides. 1 Clavate basidia with filamentous sterigmata, from the ends of which spherical spores are abjointed (from the 

 hymenium of Amanita phalloides). Hydnum imbricatum. Polyporus perennis. *, , , *, *, , 8 , 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. 



