'J2 Tin; 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 /x.. 

 G. ARIDUM E. & H. 



On Fraxiiuis Pcniis\lvanica, June 10, 1894 (Ntittall, 154^, 



518)- 

 G. RuMicis E. & E., Field Mus. Bot., 1:122 (1896). 



Type habitat: On leaves Rumex obtusifoHiis, Oct. 27, 

 1894 (Nut tall, 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 fi. 



The spots resemble those of Ovnlaria obliqiia Ckc, on 

 Ramularia decipiens E. & E. 

 G. Alni E. & E., Field Mus. Bot., i :i23 (1896). 



Type habitat : On living leaves Alnus riigosa, 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 

 fjL diaftieter, chestnut color, becoming darker ; conidia oblong- 

 elliptical, 12 to 16 X 6 to 8 ju,. 



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

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

 in the different character of the spots and rather broader 

 conidia. 

 G. nervisequum (Fckl.) Sacc. 



On leaves Platanus occidciitalis, June 10, 1894. Sporules 

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

 G. RoBERGEi Desm. 



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

 G. betularum Ell. 81 Mart. 



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

 all, 1607). 



G. CYLINDROSPERMUM BoU. 



On leaves of Altius 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 



