SPORE-DISCHARGE IN THE TREMELLINEAE 169 



in a vertical plane in a compressor cell as before, to wait until a 

 spore-deposit had collected, and then, with a vertical microscope, 

 to examine the preparation and measure the horizontal distance 

 the spore-deposit extended away from the vertical plane of the 

 hymenium. 1 The first method was used for the Polyporeae and 

 Agaricineae and the second for the Clavarieae and Tremellineae. 

 The special methods used for the Uredineae will be described in 

 Volume IV. 



Maximum Horizontal Distance of Spore-discharge in Basidiomycetes. 



The data embodied in the Table indicate that most of the 

 Uredineae are able to shoot out their spores a horizontal distance 

 of 0'6 rnm., most of the Tremellineae 0-4 mm., and most of the 

 non-tremelloid Hymenomycetes either 0-1 or 0-2 mm. Thus, so 

 far as violence of spore-discharge is concerned, the Tremellineae 

 (with the exception of Calocera), while holding an intermediate 



1 For these two methods cf. vol. i, 1909, pp. 135-142. 



