520 RESEARCHES ON FUNGI 



the four spores detachable from their sterigmata. Detachment of 

 one part from another in each model is accomplished simply by a 



Fig. 212. — Two models of basidia, the taller two feet high. 

 To the left, a teleutospore of a Rust fungus [Puccinia 

 Malvacearum) from the upper cell of which projects a 

 curved basidium with four sterigmata and four spores ; 

 the basidium detachable from the teleutospore, and the 

 spores from the sterigmata. To the right, a basidium of 

 a Hymenomyeete, the spores detachable from the sterig- 

 mata. By holding each model horizontally with the 

 left hand and by pulling off the spores one by one with 

 the right hand, one can show to an audience the violent 

 and successive discharge of the spores and the sporabolic 

 trajectories. 



gentle pull. The Rust model, made entirely of wood, was con- 

 structed at Winnipeg by my former laboratory attendant, Rudolf 



