440 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
late w all and comparatively small central contents, somewhat more 
vaiiable in size than the spores; spores light chocolate brown, 
chiefly subspherical or spherical, with prominent short blunt tubercles 
often reaching only half way to outer margin of the prominent 
hyaline membrane which forms a band usually 2-4 fx wide and 
shows papilla of attachment, 17-22 /x in length. 
Host: JBuchloe clactyloides , Ivans, (type). 
According to Ivellerman and Swingle this smut was found only in 
the male spikelets, developing in the abortive ovaries. It undoubt¬ 
edly has a wider distribution than has so far been recorded. Norton 
succeeded in germinating the spores showing the smut to be a Til- 
letia but he gives no description of the germination. Literature : 
129. 
Tilletia Cathesteci (P. Henn.) Clint. 
Ustilago Cathesteci P. Henn., Hedw., 36 : 212. 1897. 
Tilletia Cathesteci Clint., Journ. Myc., 8 : 149. 1902. 
Soii in ovaries, ovoid, about 1 mm. in length, often inconspicuous 
and with styles still attached, more or less concealed by the glumes, 
with black brown spore mass; sterile cells hyaline, with very thick 
vail, less common than the stages of immature spores; mature 
spoies chocolate brown, chiefly subspherical or spherical, with prom¬ 
inent conical tubercles (becoming blunt and less conspicuous with 
maturity) which extend out half way or more to the very evi¬ 
dent hyaline membrane, chiefly 19-24 fx (exclusive of envelope) in 
diameter. 
Host: Cathestecum procumbens , Mex. (type). 
This species which Hennings described as an Ustilago is undoubt¬ 
edly a Tilletia. It is questionable if it is distinct from Tilletia 
buchloeana. The spores in the very fragmentary specimen sent the 
writer by Hennings are slightly larger and the tubercles somewhat 
more prominent, but it is not certain that even these slight differ¬ 
ences are constant. Its germination is not known. 
Tilletia corona Scrib. 1 
Tilletia covona Scrib., 1 Ell. & Ev., N. A. Fungi, 1896. 1887 
1 A description of this fs given by Tracy and Earle in Bull. Torr. Bot. Club, 
23: 210, in 1896, but they make their description to include T. pulcherrima. 
