CLINTON: NORTH AMERICAN USTILAGINEAE. 
399 
of its forms approaches very closely to that species. In general it is 
distinguished by a smaller more powdery sorus and smaller usually 
lighter colored spores that are often provided with the wing-like 
projections. There is great variation in size, shape, and color of 
the spores in different specimens but it seems impossible to separate 
such as distinct species. Ustilago juncicola on Juncus Chamis- 
sonis, described by Spegazzini in Fung. Guar., p. 15, and issued in 
Balansa’s PI. Par., no. 4323, to which Spegazzini refers, was found 
in the set of this exsiccati at the Harvard cryptogamic herbarium, 
to be merely Cintractia Montagnei and Mr. M. L. Fernald of the 
Gray herbarium identified the host as Rhynchospora and not 
Juncus. As the specimen in this set may possibly be improperly 
labeled, TJstilago juncicola is referred to here as a synonym with a 
question mark. This species has apparently not been germinated. 
Literature : 115. 
Cintractia Psilocaryae (Tr. & Earle) Clint. 
Ustilago Psilocaryae Tr. & Earle, Bull. Torr. Bot. Club, 26 : 493. 1899. 
Cintractia Psilocaryae Clint., Journ. Myc., 8 : 142. 1902. 
Sori in ovaries, inconspicuous, hidden by glumes, in time 
powdery; spores dark reddish brown, somewhat laterally com¬ 
pressed and so oval to circular in cross section according to view, 
usually conspicuously angled, with very dark and irregularly 
thickened walls (often 3 /x), under an immersion lens with the com¬ 
pressed sides showing faint reticulated appearance at center and pits 
toward the circumference, chiefly 12-15 g in length. 
Hosts: Psilocarya nitens, Fla., Miss, (type) ; P. scirpoides, 
Mass., R. I. 
This species is very closely related to some of the forms of 
C. Montagnei and has been referred to that species by some 
botanists (Curtis collection). It differs in the thicker irregular cell 
wall and the possession of reticulated as well as pitted markings. 
The germination has not been reported. 
Cintractia limitata Clint, n. sp. 
Sori in the spikelets, infecting only part, at first concealed by the 
enveloping glumes but with the semi-agglutinated spore mass finally 
becoming powdery and showing in the vicinity of the infected spike- 
