REPORT OF THE BOTANIST. 105 
tured and lacerated at the apex, white; spores large, sub- 
globose, rough, with a thick epispore, yellow, about .0015’ 
in diameter. 
Leaves of spruce trees, Abies nigra. Adirondack Moun- 
tains. August. (Plate 1, figs. 19-21.) 
I found this species very abundant on the low starved 
spruces of the high summits and cold sphagnous marshes 
of the Adirondack Mountains, attacking and discoloring the 
foliage to such an extent as to give the trees a yellowish hue 
even when seen at a distance. Minute brown or blackish 
dots, probably the spermogonia of the fungus, are scattered 
upon the affected leaves. 
PTERULA SETOSA 2. Sp. 
Simple or branched, setose, about one-fourth of an inch 
high, whitish or straw-colored with whitish tips, the branches 
slightly diverging, clothed above with widely diverging hair- 
like filaments; spores elliptical or subglobose, .00016’- 
. 0002’ long. 
Decaying Polyporus elegans. Adirondack Mts. Aug. 
The plants grow rather thickly upon the matrix, and are 
in appearance suggestive of prickles upon a burr 
CLADOSPORIUM LIGNICOLA Cd. 
Birch chips. Indian Lake. July. 
CLADOSPORIUM TyPHzE Scho. 
Dead leaves of Typha latifolia. Buffalo. Clinton. 
This appears to differ from C. Herbarwm in habit. 
OIDIUM CORTICALE 2. Sp. 
Tufts minute, orbicular, convex, at first compact and 
bluish-brown, then more lax and paler or cinereous ; flocci 
few, nodose ; spores small, colored, subglobose or suban- 
gular, .00016° in diameter, joined together in moniliform 
strings. 
a Vas North Greenbush. Oct. (Plate 2, figs. 7 
and 8. 
The strings of spores do not so readily break up into dis- 
tinct spores as in most other species. 
FUsIDIUM FLAVOVIRENS FY. 
Fallen leaves. Albany. Oct. 
14 
