ie 2 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 



I J| KL MNOP R 



• IMttftt • « 



I0JU. O.0U, 



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 O, four individuals of Psalliota campestris ; 

 P, Paxillus involutus ; Q, t lute us cervinus ; R, Collybia dryophila. 



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

 they have been developed. 



