Dearness: North American Fungi 359 



40. Cylindrosporium salicinum (Peck) comb, no v. 



Septoria salicina Peck. Ann. Rep. N. Y. State Mus. 25 : 87. 1873. 

 Septoria albaniensis Thum. Bot. Gaz. 5: 122. 1880. 

 Phleospora Dearnessii Sacc. 1914. 



In Mycologia 8 : 105, I drew attention to the confusion in 

 the names of Cylindrosporium on Rhus spp. due to the wide 

 variation in size of the spores and the uncertainty as to whether 

 they are formed in a true pycnidium. 



Similar confusion obtains in respect to the names of species 

 parasitic on the leaves of Salix spp. which in my own herbarium 

 is labelled Cylindrosporium salicinum Ellis & Ev. sp. nov. in litt., 

 Sept., 1892. This name was not published because the late Mr. 

 J. B. Ellis on further study concluded that it " was too near 

 Septoria albaniensis Thiim." In 1873 Prof. Peck published 

 Septoria salicina, on Salix lucida, Ann. Rep. N. Y. State Mus. 25 : 

 87. 1873. Septoria albaniensis Thiim., on Salix lucida was pub- 

 lished in Bot. Gaz., Oct., 1880. Careful comparison of authentic 

 material — types or co-types — of the foregoing failed to reveal a 

 satisfactory means of distinguishing them. 



Co-type of Phleospora Dearnessii Sacc, on Salix nigra, pub- 

 lished in 1914, Ann. Myc. 12 : 299, cannot be separated with cer- 

 tainty from the preceding. Dr. Saccardo remarked that this 

 species verges on Marssonia, but the sporules favor Phleospora 

 and further that it may not be different from Septoria albaniensis 

 Thiim. and S. salicina Peck, the descriptions of which are inade- 

 quate for a decision. In the apparently earlier stages their dis- 

 colorous pustules bear a resemblance on the surface to pycnidia 

 but finally they become nearly concolorous and are visible as cir- 

 cular depressions or cavities rupturing usually, not always, through 

 the lower cuticle of the leaf. 



Fungi Columb. 3872, incorrectly labeled Septogloeum salicinum 

 (Peck) Sacc, has somewhat larger sporules and some of the 

 spots are larger and conspicuously circinated or mottled. The 

 differences, taking a large number of specimens into account, are 

 insufficient for a new form-species. It might, however, pass for 

 a variety, say var. circinatum. 



