REPORT OF THE BOTANIST. 4] 
Cercosrora Api Fes. 
Living parsnip leaves. Richmondville. Sept. 
Prronospora Ficaria Tul. 
Living leaves of crowfoot, Ranunculus recurvatus. Center. April. 
PrRONOSPORA CorypDALIs De By. 
Living leaves of squirrel-corn, Dicentra Canadensis. Helderberg Moun- 
tains. May. 
This form varies somewhat from the European form on leaves of Corydalis, 
but perhaps not sufficiently to warrant its separation as a species. It usually 
occupies the whole lower surface of the leaves. 
PERONOSPORA GANGLIFORMIS Berk. 
Living leaves of milkweed, Mulgediwm leucopheum. Central Bridge 
and Catskill Mountains. June and July. 
VERTICILLIUM LATERITIUM [Hh7. 
Decaying wood. Buffalo. Oct. Clinton. 
PoLyACTIS CINEREA Derk. 
Dead stems of herbs. Greenbush. May. 
The fungus was found growing from a black Sclerotium. 
PENICILLIUM BICOLOR 7, 
Decaying fungi, leaves, etc. Sandlake. Aug. 
SPONDYLOCLADIUM TENELLUM 2. sp. 
Patches thin, effused, subolivaceous ; flocci somewhat tufted, erect, slender, 
simple or rarely branched, septate, brown, .006-.014’ high; spores in 
verticels of two to four at the septa, oblong, simple, pale, .00045'-.0005' 
long, .00016’—.0002' broad. 
Dead stems of stone root, Collinsonia Canadensis. North Greenbush. 
October. be 
This species is distinguished from S. fwmoswm by its simple spores and 
the olivaceous hue of the patches, which to the naked eye appear like a thin 
floccose tomentum. 
OIDIUM DESTRUENS 2. sp. 
Effused on large brown spots, odorous, whitish or pale cinereous; flocci of 
two kinds, the sterile spreading, much branched, closely appressed to the 
matrix, the fertile erect or decumbent, somewhat branched, forming monili- 
form strings of spores ; spores unequal in size and variable in shape, elliptical 
subglobose or angular, sometimes with an apiculus at each end, .0002'-.0006' 
long. 
Living leaves of Amelanchier Canadensis and Prunus serotina. Center 
and Sandlake. May and June. 
This fungus quickly destroys the vitality of the leaves it attacks, but for- 
tunately its ravages are not extensive, only a few leaves on a tree being 
