REPORT OF THE BOTANIST. 95 
This is a very distinct species. The branches at the tips of the 
appendages are slightly curved and diverge nearly at right angles 
to the appendage. When mature the plants often become collected 
in entangled masses, giving the leaf the appearance of being coated 
with dusty cobwebs. 
Microspr@ra putcura C. & P. 
Amphigenous; mycelium thin, persistent; conceptacles numer- 
ous, globose, black; appendages eight to twelve, about equal in 
length to the diameter of the conceptacles, colorless; sporangia 
four or five, containing four to six spores. 
Leaves of Cornus alternifolia. Greenbush. September. 
The mycelium is more conspicuous on the upper than on the 
lower surface of the leaves. The conceptacles are often closely 
placed over large portions of the leaf. 
Microspura pirrusa C. & P. 
Mycelium thin, evanescent ; conceptacles minute, globose, black ; 
appendages numerous, eighteen to twenty-five, in length once or 
twice the diameter of the conceptacle, colorless, somewhat irregu- 
larly divided anc slightly nodulose at the tips; sporangia ovate, 
four to six, containing four to six spores. 
Leaves of Desmodium Canadense. Albany. September and 
October. 
This plant generally occupies the upper surface of the leaf but 
sometimes spreads to the lower. 
MicrosPH®RA EXTENSA C. & P. 
Mycelium thin, effuse, persistent; conceptacles globose, black ; 
appendages eight to twelve, in length three or four times the 
diameter of the conceptable, colorless; sporangia four, subglobose 
or ovate, containing four to six spores. 
Upper surface of oak leaves, Quercus rubra. Greenbush. Sep- 
tember and October. 
It frequently occupies the whole upper surface of the leaf but I 
have never seen it extend to the lower surface. It may readily be 
distinguished by its habit and fewer differently shaped sporangia 
from A. Vaecinie which also has very long appendages. 
MicrosPH#RA HOLOSERICEA Lev. 
Leaves of Astragalus. buffalo. Clinton. October. 
Microspu#ra Hepwien Lev. 
Leaves of Viburnum Lentago. Albia, Rensselaer county. Sep- 
tember and October. 
