1894, ] Notes on Ustilaginee. _ 189 
The development of the spores has not been studied very 
carefully in any species of Entyloma, yet it is known that in 
some species at least they are subterminal as well as inter- 
calary. Consequently, it seems best to regard this form as 
Entyloma Nymphee (Cunningham) rather than as the type 
of a distinct genus. 
The common barnyard grass is the host-plant of two pul- 
verulent smuts, the one 7, olyposporium bullatum Schreeter, the 
other Ustilago spherogena Burrill. The distortions produced 
by these two Species are very similar in shape and size and I 
was much interested to find both of them in the same locality 
at Woodmont, near New Haven, Conn., and even in the same 
inflorescence. 
TOLYPosPoRIUM BULLATUM Schreeter inhabits the ovaries 
of Panicum C rus-galli causing them to swell to several 
times their normal size. The surface of the swollen ovary is 
smooth and shining and the Tolyposporium may thus readily 
be told from the Ustilago on the same host. _ It is, therefore, 
not @ very conspicuous species, but is apparently fairly com- 
a in the New England states. The spores are agglomer- 
ated into balls and germinate readily in water at almost any 
Panag _A longer or shorter promycelium is produced and 
Se m this, sporidia bud off either terminally or laterally. 
ee oe Sporidia are produced from these, tertiary are pro- 
nt i turn; and so on until very complex branching forms 
Bok tie type of germination is of the Ustilago- as op- 
— to the Tilletia-group, but the germination of Tolypo- 
Porium bullatum differs very decidedly in its details from that 
sels as Woronin represents it. 11 rae 
spike! AGO SPHZROGENA Burrill causes distortions of the 
ts of Panicum C vus-galli which in size and shape 
€ More 
2 pe Size than those of the Tolyposporium and the surface 
rough, eg tion, instead of being smooth and poe Par be 
at, Short, rigid hai is i nted for e 
fact that the » tigid hairs. This is accou y 
Se and distorted by the fungus. . : 
in Ed lg are free and germinate readily on being tele 
the p Nn a slide. Sometimes sporidia were produced when 
“omycelium has reached a length of a few micromilli- 
4, Jigs. 5-8. 
