SPORES AND THALLIDIA. 



21 



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

 chiefiy 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 



» Clavaria aurea. ' Divdalea qvcrc. 

 phalloides. ' Clavate basidia w 

 hynieiiiiim of Amanita phallo, 

 ' X 250. 



Fig. 195.— Basidiomycetes. 



na. i Marasmiiistenerrimus. * Marasminsperfnrans '■Craterclbis dnvntus. » Aniayiita 

 th filamentous sterigmata, from the ends of whicli spherical spores are ahjointed (from the 

 des). 8 Ijydmnn imbricatnm. 9 Polyporus perenitis. i, =, ». ■•, ', «. «, » natural size; 



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

 hke 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. 



