444 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
nutrient solutions, give rise to a mycelium producing secondary 
sporidia of two kinds. 
Some of the species of Tilletia have an investing membrane with 
a more or less prominent protuberance at one side. In the type of 
this genus, JV. Moliniae , however, these appendages are very strik¬ 
ing, though sometimes they dehisce regularly near the spore. Mag¬ 
nus considers them sterigmata, but to the writer this does not seem 
to be a proper designation. Four species have been placed under 
the genus, only two of which, apparently, properly belong there. 
Neovossia lowensis Hume & Hods. 
Neovossia lowensis Hume & Hods., Bot. Gaz., 30 : 274. 1900. 
Sori in ovaries, ovoid, about 2-3 mm. in length, showing between 
the spreading glumes, upon rupture of covering membrane disclosing 
dusty black spore mass; sterile cells or immature spores hyaline, 
thick walled, chiefly smaller than the spores; spores reddish brown, 
subopaque, ovoid or ellipsoidal to rarely subspherical, with promi¬ 
nent hyaline envelope that terminates at one end in a tapering 
irregular tail about twice the length of the spore, with cell wall 
minutely reticulate pitted, 19-28 /x x 13-19 /x. 
Host: Phragmites communis, Conn., Ia. (type). 
This species is so closely related to Neovossia Moliniae of 
Europe, under which name it was first reported in this country, 
that it is somewhat doubtful if it deserves specific distinction. The 
only difference seems to be that the spores of the American form 
average slightly shorter and are comparatively broader as a rule. 
The spores have not been germinated. 
Tuburcinia [Fries] Wor. emend. 
Abh. Senck. Nat. Ges., 12 : 560-572. 1882. 
(Fries, 1 Syst. Myc., 3 : 439. 1829.) 
Type : Tuburcinia Trientalis B. & Br. 
Host: Trientalis Europaea. Eur. 
1 While Fries first described this genus none of his three species now come 
under it as amended by Woronin’s work. 
