WEST VIRGINIA GEOLOGICAL SURVEY 53 



P. Sambuci Desm. 



On leaves Sambucus Canadensis. July 20, 1894 (Ntittall, 

 1614). 

 P. Labruscae Thum. 



On living leaves Vitis cult. (Concord), Wood Co., near 

 Lockhart's Run, 1891 (Millspaugh). On leaves of V aesti- 

 valis and rupestris, June 29, 1894 {Nuttall, 1569). 

 P. coRNicoLA (D. C.) Rabh. 



On Cornus Horida, Nov. 5, 1894 {Nuttall, 1748, 638). 

 P. Cookei Sacc. 



On leaves Magnolia acuminata, Aug. 9, 1894. Sporules 

 15 to 20 X 6 to 7.5 IX. {Nuttall, i'6s5, 577). 

 P. TiLiAE Sacc. 



On leaves Tilia Americana, Aug. 10, 1894. Sporules 7 

 to 8 X 2.5 to 3 /i {Nuttall, 1672, 579). 

 P. Chionanth'i Thum. 



On Chionanthus Virginica, Aug. 10, 1895. Spots darker 

 than in type (from Portugal). Spores round or oval, 5 

 /x or 7.5 X 5 )n {Nuttall, 1833, 724). 



P. LiRIODENDRICA SaCC. 



On leaves Liriodendrom Tulipifera, June 16 and Oct. 29, 

 1894. Sporules 7.5 to 10 x 2 to 3 ;u, {Nuttall, 1571). P. 

 Li/riodendri. Cke. 

 P. Ulmi West? 



On leaves Ulmus pubescens, July 9, 1894. Sporules + 16 

 X 7.5 f^ {Nuttall, 1631, 563). 

 P. piiOiiiFORMis Sacc. 



On leaves Quercus Prinus and Q. alba, July 4, 1894. 

 Sporules 15 to 30 x 6 to 8 ju, {Nuttall, 1585). 

 P. Castaneae E. & E., Proc. Phila. Acad., 1894, 357. 



Type habitat: On leaves Castanea pumila (not on Cas- 

 tanea vesca as originally published), July 26, 1894 {Nuttall, 

 discov. 1639, 570). 



Spots orbicular, rust-color, with narrow dark-shaded mar- 

 gin. Perithecia epiphyllous, scattered on the spots, dark, 

 semierumpent, 100 /a diameter, often collapsing. Sporules 

 oblong, hyaline, 5 to 7 x 2 to 2.5 /*. 

 P. Lappae Sacc. 



On Arctium Lappa, July 20, 1894 {Nuttall, 1613). 

 P. DioscoREAE Cooke. 



On leaves Dioscorea inllosa, June 29, 1894 {Nuttall, 1570). 

 P. Opaca E. & E. Field Mus. Bot., 1:106 (1896). 



Type habitat : On leaves of Ilex opaca. Oct. 5, 1895 

 {Nuttall, discov., 1881). 



Spots mostly marginal or terminal, of irregular shape, 

 I and 2 cm. across, dirty-white, with a raised subferruginous 

 narrow border. Perithecia evenly scattered, subepidermal, 



