400 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
lets as a purplish black powder; spores chiefly dark reddish brown, 
ovate or ovoid to chiefly subspherical or spherical, occasionally some¬ 
what polyhedral, often with pitted contents, smooth, 9.5-14 /x in 
length. 
Host: Cyperus ligularis, Porto Rico (Mayaguez and San Juan, 
type). 
The spikelets of this host are closely crowded together into dense 
lobed spikes and usually only the spikelets at the ends of these are 
infected. The sori are very similar to those of C. Cyperi but the 
spores are entirely different, being very much smaller and more reg¬ 
ular. The character of the sorus distinguishes it from C. axicola 
var. minor also reported from Porto Rico on Cyperus sp. 
Cintractia Cyperi Clint, n. sp. 
Sori in the interior of the spikelets, infecting all in the head, 
hidden by the enveloping glumes, scarcely modifying appearance of 
infected parts so that diseased heads are told from the sound only 
by slightly darker color, in time shedding somewhat the brown 
black granular spore mass; spores reddish brown, more or less 
agglutinated but easily broken up into single spores, oblong to 
polyhedral but chiefly irregular, apparently smooth but with epi- 
spore often showing darker lines due to pressure of spore mass, 
12-18 /x, or most elongated 22 /x, in length. 
Host: CyperusJiliculmis, Conn. (type). 
This is quite different from Cintractia axicola var. minor, also 
on Cyperus, in the character of both the sorus and the spores. 
The hidden sorus and the large irregular spores are the points of 
chief interest in this species. In these respects it approaches some 
of the forms with irregular spores of Cmtractia Montagnei. The 
fungus has been collected twice in Connecticut, on the sand plains 
about North Haven and Montowese, and is not uncommon in those 
places. The spores have not been germinated. 
Cintractia subinclusa (Korn.) Magn. 
Ustilago subinclusa Korn., Hedw., 13: 159. 1874. 
Anthracoidea subinclusa Bref., Unters. Gesammt. Myk., 12: 146. 1895. 
Cintractia subinclusa Magn., Abh. Bot. Ver. Prov. Brand., 37: 79. 1896. 
Exsiccati: Ustilago subinclusa Korn., on Carex lanuginosa , Griff., West 
Amer. Fungi, 232, on Carex trichocarpa var. Deweyi, Ell. & Ev., N. A. 
Fungi, 1889, on Carex utriculata, Griff., West Amer. Fungi, 231, 231a. 
