602 



In the following species the fructification is unknown. 

 Ph. permeans, (B. & C.) 



Dothidea permeans, B. & C. N. Pac. Expl. Exp. No. i6i. 



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

 matrix, elevated-subrugose. Ostiola indistinct. 



On leaves, Nicaragua. 



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



Stromata amphigeiious, minute {\-\ mm.), on subindefinite, pale 

 spots, black, ^tylospores fusoid-oblong, hyaline, 7-8 x 2-2i n, binu- 

 cleate, becoming uniseptate. 



On leaves of Oxalis corniculata, 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 

 socn until the portion of the leaf covering them is cut away. Cells 

 numerous, subrotund, crowded, white. 



On leaves of Vaccinium VitisdclcBa, Nugarsunguak, Greenland. 



Resembles an old Phacidium. 



Ph. Pcinici, Schw. 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 A^ewfield, 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, a.s yet, only found sterile. 

 Ph. Enpatorii, (B. & C.) 



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

 Phyllackora Eupatorii, Sacc. Syll. 519S. 



