PLATE 79 » 



A. — Typical conidiophore, 2 showing characteristically long, slender, unknobbed 

 basal cell, relatively short main axis with its greatest diameter about midway to the 

 primary branches, and fairly well-developed branch system bearing long, slender 

 conidia. The number of conidia is somewhat less than that usually encountered. 

 From maize inoculated from Saccharum spontaneum. X 375- 



B. — Upper portion of a conidiophore which has a poorly developed branch system 

 and hence bears few conidia on sterigmata which are relatively large. Several conidia 

 have been broken off in mounting. From maize. X 375- 



C. — Portion of the branch system of a conidiophore, showing the conidia germinat- 

 ing while still attached to their sterigmata. From maize. X 375. 



D. — Stalk portion of a typical conidiophore, showing long, slender, unknobbed 

 basal cell, and main axis which is slender above the septum, expands rapidly to its 

 greatest diameter about midway, and contracts again below the branches. From 

 Saccharum spontaneum. X 375- 



E, F. — Typical basal cells of conidiophores. E from Saccharum spontaneum; F 

 from sugar cane. X 375- 



G. — Stalk portion of a conidiophore with basal cell which, though unusually short, 

 nevertheless is longer than the extent of the main axis from septum to primary 

 branches. From Saccharum spontaneum. X 375. 



H. — Typical stalk portion of a conidiophore from sugar cane. Compare with A 

 and D. X 375- 



I, J, K» — Typical conidia showing variations in size and shape and method of ger- 

 mination by hyphae. I from maize, the lowest figure from material especially fixed 

 and stained to bring out the internal structure; J from Saccharum spontaneum; K 

 from sugar cane. X 375. 



1 The drawings were made with the aid of a camera lueida. Figure A aad the ungerminated conidia of 

 figures I, J, and K are from fresh material. All the other drawings are from preserved specimens. 



s In comparing these drawings with the plates of Sclerospora phtlippinensis (12) it should be noted that 

 the latter give a somewhat misleading impression of the relative spreading of the branch system because 

 the conidiophores were flattened slightly in mounting. 



