No. 5.] USTILAGINE® OF CONNECTICUT. 39 
lowish or eventually reddish brown subcircular spots, which 
sometimes merge into indefinite areas. The spore balls are 
situated in the spongy parenchyma of the leaf, and consist of 
a distinct cortex surrounding a single layer of fertile cells 
within which is a central mass of sterile cells; they are chiefly 
subspherical or spherical, and 100-1604 in diameter. The 
cortical cells are brown and small. The spores are slightly 
yellowish tinted, chiefly polyhedral or slightly elongated ra- 
dially, and 8-12» in length. 
Host and Distr.: Potamogeton sps., Norwich (Setchell) ; 
New Haven (Setchell) ; Simsbury (Setchell) ; Whitneyville, 
Aug. 18, Sept. 21, 1902; Westville, Sept. 8, 1904. 
Doassansia deformans Setch. The sori occur in various 
parts of the host, usually in the leaves, where they form con- 
spicuous distortions in the midribs and petioles. The spore 
balis occur in the intercellular spaces, and consist of a cortical 
layer surrounding a single layer of fertile cells within which 
is a central mass of sterile cells; they are chiefly subspherical, 
and vary from 100-140 in diameter. The cortical cells are 
polyhedral, occasionally slightly elongated tangentially, small, 
about 4-64 by 8-12p. The spores are ovoid to polyhedral, 
rather firmly united, and chiefly 8-12y, rarely 15, in length. 
Host and Distr.: Sagittaria variabilis, Norwich, Aug. 17, 
1889 (Setchell)’; New Haven (Setchell). 
This species was originally described by Setchell from 
Connecticut material. 
Doassansia obscura Setch. The sori are obscured, the 
spore balls being hidden in the interior of the basal parts of 
the petioles without especial discoloration or distortion. The 
spore balls are arranged in a single row in the air chambers 
of the host, and consist of a distinct cortex surrounding several 
irregular layers of spores and a central mass of indefinite fun- 
gal hyphz; they are oblong to subspherical, and of very large 
size, 150-300 in length. The conspicuous cortical cells are 
light brown, ovoid to obovate or subcordate, and 12-18, by 
8-12. The spores are chiefly subspherical and small, 8-12y. 
in diameter. 4 
Host and Distr.: Sagittaria variabilis, Norwich, Sept. 
(Setchell). 
