602 



In the following xpecies the fructification is unknown. 

 Ph. periiieans, (B. & C.) 



Dothidea pet means, B. & C. N. Pac. Expl. Exp. No. 161. 



Spots irregular, substellate-orbicular, black, permeating the entire 

 matrix, elevated-subrugose. Ostiola indistinct. 



On leaves, Nicaragua. 



Ph. oxalina. E. & E. (in Herb.) 



Stromata amphigenons, minute (\-\ mm.), on subindefinite, pale 

 spots, black. Stylospores fusoid-oblong, hyaline, 7-8 x 2-2 \ //, binu- 

 cleate. becoming uniseptate. 



On leaves of Oxalis cornicidata, Delaware (Commons). 

 Ph. latitans, (Fr.) 



Dothidea latitans, Fr. S. M. II, p. 522. 

 Phyllachora latitans, Sacc. Syll. 5164. 



Stromata innate in the parenchyma of the leaf, and not readily 

 seen until the portion of the leaf covering them is cut away. Cell? 

 numerous, subrotund, crowded, white. 



On leaves of Vaccinium Vitis-idcea, Nugarsunguak, Greenland. 

 Resembles an old Phacidinm. 



Ph. Panici, Schvv. Syn. N. Am. 1925 (sub Dothidea). 



Spots gray, thin, linear, longitudinally and laterally confluent 

 between the nerves of the leaf, without any distinct fibrils. Cellules 

 minute, subseriately arranged on the opposite side of the leaf. Spots 

 numerous but minute. 



On leaves of different species of Panicum, Bethlehem, Pa. 

 (Schw.); also common around Newfield, N. J. 



Ph? Polemonii, Hark. Bull. 7, of the Cal. Acad. p. 446. 



Amphigenous, spots black, roundish, 2-6 mm. broad, papillate 

 and shining. 



On living leaves of Polemonium humile, Sierra Nevada Mts., 

 California; alt. 7000 ft. 



Very showy, but, as yet, only found sterile. 

 Ph. Eupatorii, (B. & C.) 



Dothidea Eupatorii, B. & C. Grev. IV, p. 105. 

 Phyllachora Eupatorii, Sacc. Syll. 5198. 



