﻿1903] NORTH AMERICAN HYPHOMYCETES I59 



Fig. 5. Branch of the fourth order bearing tuft of sporiferous branchlets. 



Figs. 6-^]. Young sporogenous branches from which branchlets of the 

 third and fourth order are budding. 



Fig. 8. Young fertile head, the subclavate branches of the corticating 

 hyphae projecting from among the young sporogenous branches. 



Fig. g. A more mature condition, in which these branches are becoming 

 bristle-like and are giving rise to the whorls of lateral branchlets which form 

 the sterile envelope shown \nfig. i. 



Fig. 10. Tip of one of the mature setae, showing echinulation. 



Figs. 11-16. Cephaliophoi'a tropica. 



Fig. 1 1. Normal sporiferous head with spores in situ. 

 Fig. 12. Young head with spores just developing. 



Fig. 13. Abnormally elongate head with unusually long 4-5-septate 

 spores. 



Fig. 14. Abnormal development of spores directly from the hyphae. 

 Fig. 15. Normal head seen in optical section. 

 Fig. 16. Normal fully mature spore. 



Figs. 17-20. Cephaliophora irregularis. 



Fig. 17. Head with rather broad spores. 

 Fig, 18. Head in optical section showing normal spores. 

 Fig. ig. Head in optical section with broad biseptate spores. 

 Fig, 20. Three spores. 



