﻿Arthur and Fromme: A new Endophyllum 61 



mycelium is no doubt a constant corollary and necessity for all 

 such short-cycle rusts that depend on a non-resting teliospore for 

 propagation in temperate or arctic regions. It is probable that 

 other species, now placed in the form genus Aecidium and con- 

 sidered unconnected aecial stages of heteroecious rusts, will prove 

 to be short-cycle forms like Endophyllum tuberculatum. Suitable 

 germination tests of such species will decide the matter. 

 Purdue University, 



planatton of plate ] 



L one-celled spore showing two nuclei. 

 L two-celled spore. 

 L peridial cell. 



Early germination stages of one-celled s 



