72 THE WEST VIRGINIA FLORA 



Spots yellow, oblong or irregular, 3 to 5 mm. diameter, 

 situated near the apex of the leaf which is more or less uni- 

 formly blackened. Acervuli epiphyllous, numerous, innate, 

 yellow and conspicuous. Conidia oblong, hyaline, continuous, 

 mostly a little curved, 8 to 15 x 3.5 to 5.5 /*. 

 G. ARIDUM E. & H. 



On Fraxinus Pennsylvania, June 10, 1894 (Nuttall, 154=;, 



G. RUMICIS E. & E., Field Mus. Bot., 1 1122 (1896). 



TYPE HABITAT : On leaves Rumex obtusifo'lius, Oct. 27, 

 1894 (Nuttall, discov. 1729, 617). 



Spots reddish-brown, lighter in the center, more or less 

 distinctly zonate, 3 to 4 mm. diameter, margin darker. Acer- 

 vuli innate, small. Sporules erumpent above, oblong, hyaline, 

 continuous, 5 to 8 x 2 to 2.5 ^. 



The spots resemble those of Ovularia obliqua Cke., on 

 Ramularia decipiens E. & E. 

 G. ALNI E. & E., Field Mus. Bot, 1 1123 (1896). 



TYPE HABITAT : On living leaves Alnus rugosa, Nov. 24, 

 1894 (Nuttall, discov. 1737, 624). 



Spots dirty brown, suborbicular, indistinctly zonate, .5 to 

 i cm. diameter, paler in the center, border concolorous, rather 

 indefinite ; acervuli epiphyllous, numerous, small, 100 to 120 

 /u diameter, chestnut color, becoming darker ; conidia oblong- 

 elliptical, 12 to 16 x 6 to 8 [Ji. 



Differs from G. cylindrospermuni Bon., on the same host, 

 in its much broader conidia, and from G. rubicolum E. & E. 

 in the different character of the spots and rather broader 

 conidia. 

 G. NERVISEQUUM (Fckl.) Sacc. 



On leaves Plat anus occidentals, June 10, 1894: Sporules 

 12.5 to 18 x 4 to 6 ju (Nuttall, 1555, 526). 

 G. ROBERGEI Desm. 



On Carpinus Caroliniana; July 16, 1894 (Nuttall, 1608). 

 G. BETULARUM Ell. & Mart. 



On Betula nigra, sporules 10 x 7 /*, July 16, 1894 (Nutt- 

 all, 1607). 



G. CYLINDROSPERMUM Bon. 



On leaves of Alnus rugosa. Spores 8 to 10 x 2 to 2.5 ju 

 (Nuttall, 1875). 

 G. VENETUM Speg. 



On living leaves of Rubus strigosus, Sept. 19, 1895 (Nutt- 

 all, 1859). 

 G. RUBICOLUM E. & E., Field Mus. Bot., 1:123 (1896). 



TYPE HABITAT: On leaves of Rubus strigosus (Nuttall, 

 discov. 747). 



Spots at first numerous, angular, small and yellowish or 



