State Museum of Natural History. 29 



Oidium irregulare, Ph. Living leaves of bladder nut, Staphylea tri- 

 folia. Monroe, Orange county. July. 



Cercospora Nymphseacea, C. & E. Living leaves of water lily, Nym- 

 phcea odorata. Riverhead. Sept. 



Cercospora zebrina, Pass. Living leaves of yellow clover, Trifolium 

 agrarium. Sandlake. Aug. 



Cercospora althgeina, Sacc. Living leaves of hollyhock, Althcea rosea. 

 Sandlake. Aug. 



Cercospora Smilacis, Thum. (Plate 2, figs. 1-3.) Spots numerous, 

 small, orbicular, reddish-brown, surrounded by a darker margin on 

 the upper surface of the leaf ; flocci hypophyllous, tufted, slender, 

 septate, nodulose above, colored; spores narrowly clavate, .0012 in. to 

 .0024 in. long, colorless, with two to four septa. Living leaves of 

 Smiiax glauca. Wading River. Sept, This fungus was very abundant 

 in the locality mentioned. The number of flocci in a tuft is usually 

 small, generally four to eight, and the spores are so strongly narrowed 

 toward one end that they are obclavate in form. 



Cercospora elongata, n. sp. (Plate 1, figs. 21-23.) Spots irregu- 

 lar, angular, limited by the veinlets, often confluent, sometimes arid, 

 brown grayish-brown or cinereous; flocci amphigenous, tufted, colored, 

 subflexuous, sometimes nodulose ; spores elongated, obscurely three to 

 i many-septate, gradually narrowed toward one end, colorless, .002 in 

 to .006 in. long, .00015 in. to .0002 in. broad, generally longer 

 than the flocci. Living leaves of wild teasel, Dipsacus sylvestris. 

 Jamesville. Aug. 



Cercospora squalidula, n. sp. Spots angular or subrotund, unequal, 

 brown or grayish-brown with a dark border; flocci amphigenous, 

 tufted, slightly nodulose above, colored; spores cylindrical or subcla- 

 vate, unequal in length, .0012 in. to .0045 in. long, nearly colorless, 

 simple or with one to three obscure septa. Living leaves of virgin's 

 bower, Clematis Virginiana. Jamesville. Aug. The spots are some- 

 times of a uniform dark-brown color, sometimes grayish with a darker 

 border. The species is distinct from C. olivascens which is said to grow 

 on leaves of clematis. 



Cercospora Sanguinarise, n. sp. Spots large, indeterminate, smoky- 

 brown, sometimes obscurely mottled or subreticulate with darker lines 

 on the upper surface ; flocci hypophyllous, few, scattered or subcsespi- 

 tose, rather long, colored, often nodulose above ; spores subcylindrical, 

 obtuse, four to eight-septate, colorless, .0015 in. to .0025 in. long. 

 Living or languishing leaves of blood root, Sanguinaria Canadensis. 

 Jamesville. Aug. Mycelioid filaments appear to permeate the tissues 

 of the leaf and send up, here and there, spore-bearing flocci which are 

 generally nodulose at or near the tips. Owing to the scattered mode of 

 growth of the flocci the fungus is scarcely visible, but the large smoky- 

 brown spots are very conspicuous. 



Cercospora Eupatorii, n. sp. Spots at first small and pale-green, 

 then larger, suborbicular, determinate, reddish-gray or reddish-brown, 

 with an elevated margin and darker border ; flocci tufted, short, sim- 

 ple, colored ; spores elongated, slender, generally slightly thickened 

 toward one end, obtuse, colorless, triseptate, .002 in. to .003 in. long. 

 Living leaves of Eupatorium album. Long Island. Miller. 



Oereospora griseella, n. sp. Spots suborbicular, indeterminate, yel- 



