350 Durand: Studies in North American Discomycetes 



H. ophiobohts 



After a careful com- 



A 



confess that I can detect no difference. They are alike in all es- 

 sential respects (Fig. 7). 



In 1878, Dr. Peck described a discomycete collected on rotten 

 maple bark, which he called Patellaria leptosperma Pk. Saccardo 

 later transferred this species to Lecanidion on account of its hya- 

 line spores. It is interesting to note that some of Professor Burt's 

 material already mentioned was sent to Dr. Peck, who named 

 it Lecanidion leptospermnm (Pk.) Sacc. Furthermore, I recently 

 sent some of my 1895 collection to Dr. Peck, with the request 

 that he compare it with his species. He referred it to Patellaria 

 leptosperma. Dr. Peck was also good enough to send me sped- 

 mens of this species, collected at Copake, N. Y. They agree in 

 every respect with the specimens mentioned in the preceding 

 paragraphs (Fig. 6). 



But this is not all. In 1893, there was published under the 

 name Chlorosplenium Canadense E. & E. the description of a dis- 

 comycete collected in Canada, on rotten basswood bark, by Prof. 

 John Dearness. According to the descriptions this seems to differ 



Hob 



M 



very kindly sent me recently three specimens from as many gath- 

 erings, all of which evidently belong to the same species. One of 

 these specimens was a part of the original material from which C. 

 Canadense E. & E. was described. Although the specimen is too 

 young to show spore characters, in all other respects it agrees 

 with specimens of Hokvaya ophiobohts, H. tiliacea, and Lecanidioji 

 leptospermnm. The original description of the spores shows that 

 they, also, are alike. The other specimens from Mr. Dearness 



exhibit these characters plainly (Fig. 5). With regard to the 



tomentose character of the stem, a study of specimens has revealed 

 the presence of the olive-brown tomentum on the stems of all 

 examined. In the structure of the sterile layers of the ascoma we 

 find further evidence of the specific identity of these plants. I have 

 made careful paraffin sections of specimens from Professor Burt, 

 from Ellis's N. A. F., No. 996, and of plants collected at Ithaca 

 in 1900, and find that the structure is exactly the same in all. 

 ( Fi g- 3)- In tn e light of what has been said, therefore, I cannot 



