28 RESEARCHES ON FUNGI 



develop slowly, several hours intervening between the first appear- 

 ance of a spore on its sterigma and the moment of discharge. In a 

 vertical transverse section through a gill (B) one can readily observe 

 the hymenium (/?), the subhymenium (s), and the trania (f). The 

 trama is very loosely constructed and, in the general tendency of 

 its hyphae to pass transversely from one side of a gill to the other, 

 resembles that of Lepiota cepaestipes {cf. Fig. 17, B, and Fig. 9, 

 p. 16). 



The above observations show that the fruit-bodies of Lejoiota 

 cepaestipes and of L. procera differ very considerably in their arrange- 

 ments for the production and liberation of spores. I cannot admit, 

 therefore, that these two species are very closely related to one 

 another genetically. Granting that they belong to the same genus, 

 we must regard them as divergent types. In Saccardo's Sylloge 

 Fungoruin, up to and including the year 1912, there are descriptions 

 of 374 species of Lepiota, and the genus has a very wide distribution. ^ 

 In such a large genus it is not surprising to find that the organisa- 

 tion of the fruit-bodies for the production and liberation of spores 

 is not perfectly uniform. 



^ P. A. Saccardo, Sylloge Fungorum, vols, v, ix, xi, xiv, xvi, xvii, and xxi. 



