l68 ROCHESTER ACADEMY OF SCIENCE. 



PYRENOMYCETE^ Fries. 



Fam. I. PERISPORIACEiE Fries. 



Subfam. I. ERYSIPHE^ Lev. 



I. AMEROSPOR^. Sporidia ovoid, continuous, hyaline. 

 Sph^rotheca Leveille 1851. 



200. Sphaerotheca castagnei Leveille. Pk. 25 Rep. page 

 94. Sacc. Syll. p. 4. Burrill, Parasit. Fung. Ills., p. 400. Also 

 in N. A. Pyr., p. 8. On Bidens frondosa. 1885, 



201. Sphaerotheca humuli (D. C.) Burrill. Burrill, Par. 

 Ills. p. 400 and N. A. Pyr. p. 5. On AgTiinonia eupatoria. 



202. Sphaerotheca mors-uvae (Schw.) B. & C. Burrill, 

 Par. Fung. Ills., p. 399 and N. A. Pyr., p. 7. On cultivated goose- 

 berry, forming "gooseberry mildew." 



Erysiphe Hedwig 1851. 



203. Erysiphe communis (Wallr.) Fr. Pk. 22 Rep., p. 

 loi. Burrill, Par. Fung. Ills., p. 402 and N. A. Pyr., p. 10. 

 Erysibe polygoni Schroeter, 1893, sec. Feltgen in his Vorstudien zu 

 einer Pilz-Flora des Grossherzogthums Luxemburg, i Theil, Asco- 

 mycetes, no. 1095. On Ranunculus abortivus, in woods, July 1886. 

 On Delphinium elatum, Bee Larkspur, July 1886. 



204. Erysiphe cichoracearum DC. Burrill, Par. Fung. Ills. , 

 p. 404 and N. A. Pyr., p. 12. Erysiphe Imnprocarpa in Pk. 23 Rep. 

 p. 65. On Aster macrophyllus, July, 1886. The form which has 

 been called Erysiphe phlogis Schw. was found, July 20, 1886, on 

 leaves of cultivated Phlox. 



205. Erysiphe graminis DC. Burrill, N. A. Pyr., p. 15. 

 Erysibe y Feltgen no. iioo. Only the conidial stage, Oidium 

 inonilioides Lk., was found on grass leaves, June, 1886. 



Uncinula Leveille 1851. 



206. Uncinula necator (Schw.) Burrill. Burrill, N. A. Pyr., 

 p 15. Uncinula ampelopsidis Peck in Trans. Alb. Inst., VII, p. 216 ; 

 Pk. , 25 Rep., p. 96. On leaves of Ampelopsis quinquefolia, Aug. 

 2nd, 1886. The form on grape leaves, sometime designated Uncinula 

 americana Howe, was found Oct. 1885. 



207. Uncinula macrospora Peck. Peck, Trans. Alb. Inst., 

 p. 215, Vol. VII. and 25 Rep., p. 96. Burrill, Par. Fung. Ills., p. 408 



