Report of the Botanist. 45 



Stilbum rigidum Pers. 



Decaying wood. Adirondack Mountains. Aug. 



Stilbum flavipes Pk. 



Stem villose, tapering upward, less than a line high, buff-yellow; head 

 small, subglobose or hemispherical, whitish ; spores minute, elliptical, .0001'- 

 .00012' long. 



Decaying wood. Center. Oct. 



Sporocybe abietina PL 



Very minute ; stems slender, distinctly septate, nearly black, terminating 

 above in a minute obovate or subglobose yellowish head; spores minute, 

 oblong, spermatoid. 



Bark and wood of spruce, Abies nigra. 



Specimens of spruce bark and wood, showing the work of the spruce mining 

 beetle were collected in the Adirondack Mountains. These were wrapped in 

 paper, brought to Albany, and laid away. Upon examining them some 

 months afterward, the fungus was found upon them, having evidently devel- 

 oped since the collection of the bark. It is about the size of 8. byssoides. 



Cladosporium graminum Lk. 



Dead leaves of grass and sedges. Center and North Greenbush. May. 



Helminthosporium interseminatum B. & R. 



Dead stems of stone root, Collinsonia Canadensis. North Greenbush. 

 Oct. 



Helminthosporium Hydropiperis Thum. 



Living leaves of smart weed, Polygonum Hydropiper. Albany. Sept. 



POLYACTIS VULGARIS Lk. 



On carnation pink in conservatories. Buffalo. Dec. Clinton. 



Botryosporium pulchrum Berk. 



Dead grass leaves. Center. Sept. 



In our specimens the tips of the branches are swollen ; otherwise they 

 agree with the description of the species. 



Aspergillus flavus Lk. 



On excrement of caterpillars in damp places. North Greenbush and 

 Sandlake. July and Aug. 



FUSIDIUM CANUM PaSS. 



Leaves of Erigeron Canadensis. North Greenbush. Sept. 



Peronospora simplex Pk. 



Flocci somewhat tufted, short, . .004 / -.006 / long, simple, bearing on the 

 swollen obtuse apex five to fifteen cylindrical spicules, whose length is about 

 half the diameter of the acrospores ; acrospores borne on the spicules, globose, 

 generally with a broad umbo at the apex, and a minute projecting point of 

 attachment at the base, .0008-.0012' in diameter. 



Living and languishing leaves of the New England Aster, Aster Novce- 

 AnglicB. North Greenbush. Sept. , 



