186 The Botanical Gazette. [May, 
in diameter. Sori hypophyllous, in the spongy parenchyma 
of the leaf-blade, decidedly ellipsoidal, 200-260 long and 
120-160 thick. Outer covering of two or three layers of 
semigelatinized hyphe usually present at maturity. Cells of 
the cortex more or less flattened, sometimes closely crowded 
together, sometimes more loosely placed with moderately 
thick brown walls. Spores globular, or nearly so, 6-8 in 
diameter, in several irregular layers just underneath the cor- 
tex, not readily separable by crushing. Germination? Cen- 
tral portion of the cortex made up of thin-walled parenchy- 
matous cells almost destitute of solid contents. 
On leaves of Sagittaria variabilis. Shelburne, N. H., 
W. G. Farlow! Port Arthur, Minn., 7. W. Dewart/ August 
to October. 
D. intermedia is the sixth member of the Doassansia group 
and the fifth of the genus to be found upon Sagittaria variab- 
ilis. In structure of the sorus it comes very near to the spe- 
cies of the subgenus Doassansiopsis ; but instead of the spores 
being situated in a single regular layer underneath the cortex 
as they are in D. occulta, D. Martianoffana, and D. defor- 
mans, in D. intermedia they are in several (2-5) irregular 
layers. Consequently it seems best to emend the character 
of the subgenus as follows: noe 
DOASSANSIOPSIS.—Central portion of the sorus consisting 
of parenchymatous cells. Spores in one or more layers, ag 
separable at maturity. Cortex distinct. ‘ 
D. intermedia also resembles Burrillia pustulata Sete 
ell very much in general habit and structure but differs 
me Prote- 
sae umbella- 
Doe 
sia as D. punctiformis in 1887.7 In the meantime yee 
had bestowed the name D. punctiformts upon 68 De 
species inhabiting the leaves of Lythrum hyssopifous iy 
Toni in his review of the genus* names Protomyces an rmis 
mis Niessl, D. Niessiii and retains the name D. punctt? the 
for Winter’s species. Magnus has recently® proposed 
1Verhandl. d. Naturf. Ver. i. Briinn, 10:—. 
Re cy & 
2Pilzfl. Schles., 
®Rev. Myc., 207. 1886. ; 
4Journ. Myc., 4: 17, 1888 and in Saccardo, Syll. Fung. 7: 
505- 1838. 
SAbhandl. d, Botan. Ver. d. Prov. Brandenburg, 32: 253: 1890. 
