470 Durand : Classification of the Fleshy Pezizineae 



Pezizaceae and (2) Helvellaceae. The Pezizaceae were broken 

 up into five suborders : Phacidiaceae, Stictideae, Triblideae, Der- 

 matiaceae and Pezizeae. The Lichens were distributed among the 

 first three or four of these suborders, while the Bulgariaceae were 

 included as a family under the Dermatiaceae. In subdividing the 

 Pezizeae, Rehm elaborated the principle outlined by Karsten in 

 giving prominence to the characters drawn from the sterile layers 

 of the cup. The suborder was made to include four families : 

 Mollisiaceae, Helotiaceae, Eupezizeae and Ascobolaceae, Rehm's 

 generic limits were, in general, those of Fuckel and Saccardo. 



Schroter, I in 1893, followed Rehm for the most part, but dif- 

 fered from him in including the Taphrinineae and Hysteriineae 

 under the Discomycetes. The families of the Pezizineae corre- 

 sponded to those of the Pezizeae of Rehm, except that a fifth family 

 was formed to include the genera Ascodesmis and Ascocalathinm. 

 Another arrangement of some novelty adopted by Schroter was 

 the distribution in the Pezizineae of several genera formerly in- 

 cluded with the Bulgariaceae. 



In 1894, in writing the Discomycetes for Engler and Prantl, 

 Schroter § departed somewhat from his arrangement of 1893 in 

 that he included under the Pezizineae ten families of coordinate 

 rank. Unfortunately, Schroter's work was cut short by death 

 when it was but just begun. It was continued along similar lines 

 by Lindau, by whom it was recently brought to completion. 



II. Morphological 



Limits of the Paper. — The discussion in this paper is confined 

 to Schroter's* subdivision Pezizineae, exclusive of the family As- 



codesmidaceae. 



t 



suborder Pezizeae, also to the families Pyronemaceae (in part), 

 Pezizaceae, Ascobolaceae, Helotiaceae and Mollisiaceae treated 

 by Schroter and Lindau in Engler and Prantl' s Naturlichen 

 Pflanzenfamilien. The examination is intended to cover all of the 

 cup-shaped Discomycetes which are fleshy or waxy. 



Technique. — The material on which the study and illustrations 

 are based is mostly American. Much of it was taken from the 



Schroter (i), p. 1. % Schroter (1), p. 31 



t Schroter (2), p. 173. \ \\ 501 et seq. 



