460 PROCEEDINGS OF THE ACADEMY OF [1893. 



Spots narrow- elliptical, dirty white, with a purple border, 4-6 

 mm. long by 1J-2 mm. wide, or often confluent for one or more cen- 

 timeters. Acervuli 1-4 in the center of the spots, amphigenous, 

 but more distinct above, 100-150//. diam. Conidia cylindrical, 

 15-x30 2i— 3/-/., nucleate and apparently becoming 3-septate, hyaline, 

 straight or slightly curved. 



This is a very different thing from Septoria Tritici Desrn., as 

 shown by the diagnosis and specc. of that species, and can not be a 

 Septoria as there is no perithecium. 



Cylindrosporium Calamagrostidis E. & E. 



On living leaves of Calamagrostis Canadensis, Berryville, Wis. 

 June, 1893. (Dr. J. J. Davis, No. 9316). 



Spots linear, f-1 cm. long by 1-1 \ mm. wide, white, with a pur- 

 plish border. Acervuli epiphyllous, seriate, 150— 200/* diam. Con- 

 idia filiform, curved, 40-60x1^—2//. multinucleate, (becoming 

 multiseptate)?, narrowed to a flagelliform tip at one end, the other 

 end more abruptly narrowed. The conidia ooze out in small, amber 

 colored masses. 



This is very different from Gloeosporium graminicolum E. & E. 

 in Journ. Mycol. V. p. 154. 



Cylindrosporium Toxicodendri (Curtis) (in Herb. Curtis). 

 Septoria Toxicodendri Curtis, in Peck's 29th Rep. 

 Gloeosporium Toxicodendri E. & M., Journ. Mycol. I, p. 116. 



On leaves of Rhus Toxicodendron, not uncommon, Eastern and 

 Middle States, Canada and Iowa. 



Spots reddish- brown above, whitish below, subangular, H-3 mm. 

 diam., margin darker. Acervuli mostly hypophyllous, 250-400// 

 diam. , covered by the blackened epidermis which is raised into prom- 

 inent pustules resembling perithecia. Conidia cylinrical, greenish 

 hyaline, nucleate and faintly 1-3-septate, 30—60x2^—3//.. 



A re- examination of the spec, of Gloeosporium Toxicodendri E. 

 & M., Journ. Mycol. I, p. 116, shows that the spores were erron- 

 eously described and that they are in reality as above stated. Prof 

 A. J. McClatchie sends this from Pasadena, Cala., on leaves of 

 Rhus diversiloba, agreeing with the specc. on Rhus Toxicodendron, 

 only the acervuli are mostly epiphyllous. In all the specc. the 

 acervuli finally collapse. 



