702 Wisconsin Academy of Sciences, Arts, and Letters. 
Ovularia rigidula Delacr. On Polygonum erect urn. Black 
Elver Falls and Sechlerville. 
In the Wisconsin collection I find the conidiophores 24-70 x 
3-4/*. Ovularia avicularis Pk. does not seem to be separable. 
I find amphigenous conidiophores- on European material (Jaap, 
F. selecti exsic. 291). 
Eamularia dispar n. sp. On small indeterminate leaf 
areas which become yellowish and finally dead and brown; coni¬ 
diophores hyaline, lax, mycelioid, often ascending the trichomes; 
conidia lateral in branched chains, hyaline, cylindrical, suba¬ 
cute, becoming 1-3 septate, 18-33 x 2y 2 -3y 2 fi. On leaves of 
Eupatorium purpureum. Danbury, Wisconsin, August 30, 
1916. This is of the aberrant character of Cercosporella tricho- 
phila Davis and suggests Sporotrickum in habit. 
Cladosporium humile n. sp. Spots dark reddish brown above, 
plumbeous below, suborbicular to polygonal, 2-10 mm. in 
diameter, sometimes confluent; conidiophores epiphyllous, 
most arising from small black pseudostromata of loose 
texture, erect or assurgent, dark brown, usually septate and 
often constricted at the septa, straight, flexuous or geniculate, 
10-35 x 3-5/*; conidia fuligenous, catenulate, oblong to fusoid- 
cylindrical, usually straight, becoming, in part at least, unisep- 
tate, 15-37 x 4/*. On leaves of Acer rubrum. Luck, Wiscon¬ 
sin, August 25, 1916. The spots appear to be made up of small 
black intervenular areas some of which are apparent at the 
periphery and others altogether detached. It may be that this 
fungus is secondary. [This has since been collected on Acer 
saccharinum at Plover and Arcadia]. 
Cercospora velutina Ell. & Kell. On Baptisia leucantha. 
Lynxville. In these specimens the conidiophores are borne on 
the lower surface of orbicular spots 3-10 mm. in diameter which 
are sometimes confluent and the tubercles are scarcely present. 
The conidiophores are 30-60 x 2-3/x, fasciculate from a stromatic 
base and usually somewhat curved. 
Cercospora longispora Pk. On Lupinus perennis, Millston. 
Cercospora polytaeniae Ell. & Kell. On Polytaenia Nuttallii. 
Sparta. The conidiophores of this species were described as 
4 ‘very short.’’ In this collection I find them 30-60 x 5/x, flexuous 
