Fitzpatrick : Monograph of Coryneliaceae 231 



and he figures a cluster of very minute conidia at the tip of one 

 of these hairs. His observations have not been corroborated by 

 the writer. 



Seven specimens of this fungus have been, examined by the. 

 writer. In five of these the fungus occurs exclusively in the 

 sori ; in the other two, sori are absent and the stromata are scat- 

 tered irregularly over the leaf. The general appearance of the 

 fungus in the two cases is different, but the perithecia, asci, and 

 spores are identical. Giesenhagen saw both forms of this species 

 and suggests that the fungus more often occurs in the sorus be- 

 cause the outer wall of the epidermal cells of this structure in 

 the young condition is thin and permits of easy penetration, while 

 the cuticle covering the other cells offers greater resistance. He 

 states that when the stromata are formed on the leaf outside of 

 the sori they border wounds caused by biting insects. The obser- 

 vations of the writer and those of Stevens show that the holes in 

 the leaf are caused by the advance of the fungus rather than by 

 the biting of insects, and infection apparently occurs on the un- 

 injured epidermis. The condition or age of the host at the time of 

 infection probably determines the type of tissue attacked. It 

 seems best in the present state of our knowledge to regard all 

 the material as representing one species. It is of interest to record 

 that the type material of Berkeley shows the fungus in the sori, 

 while the original specimens upon which Stevens based his de- 

 scription of Corynelia pteridicola show the annular stromata 

 scattreed over the leaf surface. 



Material Examined 



Porto Rico : Herbarium University of Illinois, Porto Rican Fungi 

 No, 3551 (material cited by F. L. Stevens as the type of Cory- 

 nelia pteridicola; communicated by him). 



San Domingo: Herbarium of the Experiment Station of the 

 Board of Commissioners of Agriculture, Rio Piedras, Porto 

 Rico, No. 1021a (material collected April 7, 191 3 by J. R. 

 Johnston at La Romana, communicated by J. A. Stevenson, 

 and deposited as Fitzpatrick Herb. No. 1528). 



Cuba: Fungi Cubenses Wrightiani No. 786 {type material of 

 Capnodium maximum B. & C. from the herbarium of Berkeley 



