Report op the State Botanist. 23 



Cercospora tenuis n. sp. 



Spots large, sometimes discoloring the whole leaf, reddish 

 brown ; hyphse fasciculate, short, .()016 in. long, .00016 broad, 

 colored, obscurely septate, the tufts appearing like minute black 

 dots on the upper surtace of the leaf ; spores very slender, gradu- 

 ally tapering to the apex, continuous or with one to three septa, 

 hyaline, .0016 to .0024 in. long. 



Living leaves of hairy bedstraw, Galium pilosum. Riverhead. 

 July. 



The species is quite distinct from C. Galii. 



Cladosporium. episphaerium Schw. 

 On Daldinia concentrica. Elizabethtown. May. 



Zygodesmus granulosus Pk. 

 Decaved wood of chestnut. Flatbush. Aug-ust. Zalriskie. 



Peronospora Hydrophylli Waite. 



Living leaves of Virginian waterleaf, Hydrophyllum Virgini- 

 cum. Bergen, Genesee county. June. 



Peziza Dudley! n. sp. 



Cups irregular, one to two inches broad, sessile, externally 

 with a minute appressed white tooaentum; hymenium bright 

 yellow inclining to saffron or orange, often rimulose ; asci cylin- 

 drical ; spores oblong, even, binucleate, somewhat granular 

 within, .001 to .0012 in. long, .0005 to .0006 broad; paraphyses 

 filiform, slightly thickened at the tips. 



Ground and decayed wood. Ithaca. October. Dudley. 



This fungus appears to be related to such species as P. aurantia 

 and P. incequalis, from both of which it is at once distinguished 

 by its yellow hymenium and larger spores. 



Exoascus Potentillae Sacc. 



Living leaves of cinquefoil, Potentilla Canadensis. Coopers- 

 town Junction. June. Middle Grove. July. 



This fungus produces greenish yellow spots on the leaves. 

 These spots are usually convex above, concave below. 



