SPORES 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. — Basldiomycetes. 



1 Clavaria aurea. - Dcedalea quercina. 3 Marasmius tenerrimus. * Marasmius perfnrans^ s Craterelhts clavatiis. ^ Amanita 

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

 hymenium of Amanita phalloides). 8 Hydnum imbricatum. 9 Polyporus perennis. i, 2, 3^ 4^ 5^ 6^ 8^ 9 natural size; 

 fx250. 



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. 



