ee ar Le oe ee Sn 
SEAVER: STUDIES IN PYROPHILOUS FUNGI 67 
Explanation of plate 4 
Pyronema om phalodes 
1. Normal ungerminated spore. 
2. Spores slightly swollen and apparently about to germinate. 
3-7. Stages in the germination of spores on the third morning after planting. 
8. Young ascogonia. 
9-10. Ascogonia and antheridia, side and end view. 
11. Mature ascus. 
12. Ascus showing dissemination of spores. 
13. Anastomosing mycelium 
figures are drawn with the camera lucida; 1-7 and 13 show stages in the de- 
veloping spores collected in the spring of 1909 and germinated January 1912, as they 
appeared on the third morning after planting. 
