1 62 RESEARCHES ON FUNGI 



fraction of a single second) they must fall without acceleration at 

 a uniform speed. The size of the spores is also such that this 



uniform speed is only about 0-5-6 mm. per second. The spores, 

 therefore, are so tiny that even the slightest air-currents can 



A BCDEFCH 



*! 



M N 



tit 



R 



t I 



o lou a.ou, 



FIG. 55. The average spores of individual fruit-bodies of various species of 

 Hyruenomycetes. A, Coprinus plicatilis; B, C. and D, three individuals of 

 Amanitopsis vaginata; E, Coprinus comatus ; F, Russula emetica; G, Poly- 

 porus squamosus ; H, Galera tenera ; I, Amanita rubescens; J, Boletus badius; 

 K, Marasmius oreades; L, M, N, and 0, four individuals of Psalliota campestris; 

 P, Paxillus involutus ; Q, f-luteus ceroinus ; R, Collybia dryophila. 



carry them long distances away from the fruit-bodies upon which 

 they have been developed. 



