io6 Field Columbian Museum — Botany, Vol. i. 



P. cornicola (D. C.) Rabh. 



On Corniis florida, Nov. 5, 1894 [Nu/iall, 1748, 638). 



P. Cookei Sacc. 



On leaves Magnolia acuminata, Aug. 9, 1894. Sporules 15 to 20' 

 X 6 to 7.5 // {Nuttall, 1655, 577). 



P. Tiliae Sacc. 



On leaves Ti/ia Americana, Aug. 10, 1894. Sporules 7 to 8 x 

 2.5 to 3 ,'/ {Xuttall, 1672, 579). 



P. Chionanthi Thum. 



On Cliionaniiiiis Virginica, Aug. 10. 1895. Spots darker than in 

 t3'pe (from Portugal). Spores round or oval. 5 ,a or 7.5 x 5 <>- 

 {Nut tall. 1833, 724). 



P. liriodendrica Sacc. 



On leaves Liriodendron Tulipifcra, June 16 and Oct. 29, 1894. 

 Sporules 7.5 to 10 x 2 to 3 // [Nut tall, 1571). P. Liriodendri,Cke, 



P. Ulmi West? 



Onleaves Ulmus pubescens, July 9, 1894. Sporules + 16 x 7.5 it. 

 {Nut tall, 1 63 1, 563). 



P. phoiniformis Sacc. 



On leaves Quercus Primis and Q.alba, July 4, 1894. Sporules 

 15 to 30 X 6 to 8 // {Nuttall, 1585). 



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



Type habitat: On leaves Castanea pumila (not on Castanca vesca 

 as originally published), July 26, i^<^\(Nuttall, discov. 1639, 570). 



Spots orbicular, rust-color, with narrow dark-shaded margin. 

 Perithecia epiphyllous, scattered on the spots, dark, semierum- 

 pent, 100 iJ. diameter, often collapsing. Sporules oblong, hyaline, 

 5 to 7 X 2 to 2.5 i>.. 



P. Lappse Sacc. 



On Arctium Lappa, July 20, 1894 [Nuttall, 161 3). 



P. Dioscoreae Cooke. 



On leaves Dioscorea villosa, June 29, 1894 {N'uttall, 1570). 



P. opaca E. & E. sp. nov. 



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

 discov., 1 881). 



Spots mostly marginal or terminal, of irregular shape, i to 2 

 cm. across, dirty-white, with a raised subferruginous narrow bor- 

 der. Perithecia evenly scattered, subepidermal, sublenticular, 

 black, raising the epidermis into pustules, 200;/ diameter. Spor- 

 ules elliptical, hyaline, 3 x 1.5 //. 



Differs from P. Ilicis E. & E. only in its minute sporules. 



PHOMA Fries. 



sp. 



OnOpulaster opulif alius, Maj' 7, 1894 (A^////a//, 15 10, 494). Spores- 

 7 to 10 x 2.5 to 3 //. 



