CLINTON: NORTH AMERICAN USTILAGINEAE. 
443 
Henn., on Paspalum, is described as having smaller spores; the 
writer has not seen a specimen. The germination of the spores has 
not been described. 
Tilletia horrid a Tak. 
Tilletia horrida Tak., Bot. Mag., 10 : 20. 1896. 
Sori in ovaries more or less destroying them, completely con¬ 
cealed by enveloping glumes ; spores showing different stages of 
development, with youngest as thick walled, hyaline cells; mature 
spores rather opaque, chiehy subspherical to spherical, with veiy 
coarse hyaline or slightly tinted somewhat curved scales showing at 
circumference of spore as a band about 2—4 /z wide and on its top 
in cross section as polygonal areas 2-3 /a across, with hyaline mem¬ 
brane more or less evident and often ending at one side in a short 
thread-like projection, 22—33 /z in length. 
Host: Oryza sativa, S. Car. 
This Japanese species has been reported in this country only from 
South Carolina, where it was found doing some damage to the rice 
fields. It has also been found here in imported rice seed from 
Japan. Takahashi has described the germination of the spores. 
Literature: 1, 2, 3, 176, 193. 
Neovossia Korn. 
Oesterr. Bot. Zeitschr., 29 : 217. 1879. 
(Vossia Thiim., 1 Oesterr. Bot. Zeitschr., 29 : 18. 1879.) 
Type : Neovossia Moliniae (Thiim.) Korn. 
Host: Molinia coerulea. Carniola. 
Sori usually in ovaries, forming a somewhat dusty spore mass ; 
spores simple, produced singly in the swollen ends of special fertile 
threads (sterigmata of Magnus) which permanently incest the spores 
and taper into elongated hyaline appendages , of large size ; germi¬ 
nation by a short promycelium producing numerous terminally clus¬ 
tered linear sporidia which germinate without conjugation and, in 
1 Name already used for a genus of grasses. 
