BOTANICAL GAZETTE [DECEMBER 
Fig. 6.—C. Tripsaci upon 
the host. 
have been included under the one name 
Sclerotium Paspali; but careful cultural 
studies and infection experiments alone 
can reveal the true relationship. That 
Sclerotium Paspali really belongs to the 
form-genus Sphacelia, where it was placed 
by Bornet, is also clear, possessing as it 
does small ovoid conidia borne — sim- 
ple slender stalks. 
Claviceps Paspali, n. sp.—Sclerotia yel- 
low to gray, globose roughened when ma- 
ture, about 3 mm. in diameter; head dull 
yellow; stipe short to medium, usually not 
more than 1 cm. long, filiform; -perithecia 
completely covering head, numerous, oval, 
340XI1IQP; asci oo 174 long; 
spores filiform, 1o1 Xo. 5-1 
Claviceps Rolfsii, n. sp. baa yel- 
low to gray, globose roughened when ma- 
ture, about 3 mm. in diameter; head dull 
yellow; stipe filiform but thicker than in 
C. Paspali, 1-1.5 cm. long; perithecia few 
in head and mostly upon extreme distal 
portion, cylindrical ovate, 816X225 #; asci 
cylindrical, 3753; spores filiform, 260—- 
275X0.5-I # 
Upon gama grass sicenngs dactyloides 
L.) in late summer, and well into winter 
characteristic fungous growths are ee seen 
protruding from the basal, ovulate portions of 
spike, sometimes nearly every spikelet 
being affected (fig. 6). e structures are 
white, 12-20 mm. long and about 2-3 mm. 
thick. Toward their tips they may be 
browned and more shrunken than in regions 
near their bases. 
Examination of the affected spikelets 
shows the grain to be absent and its place 
to be occupied by a light-colored sclerotium 
approximately the shape of the grajn of the 
