436 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
occurs on Sporobolus and the general characters are similar to the 
species described here the measurements given for the spores are 
smaller. The germination of Tilletia monta?ia is not known. 
Tilletia fusca Ell. & Ev. 
Tilletia fusca Ell. & Ev., Journ. Myc., 3: 55. 1887. 
Exsiccati: Tilletia fusca Ell. & Ev., on Festuca octojlora , Griff., West 
Amer. Fungi, 202, 202a. 
Sori in ovaries, oblong, 3—5 mm. long, usually showing plainly 
between the glumes ; sterile cells hyaline, ovoid to spherical, com¬ 
paratively thin walled, small, about 14—20 /x in length ; spores 
medium dark reddish brown, chiefly ovoid to spherical, occasionally 
slightly angled, with prominent chiefly regular reticulations (1-4 fx 
wide) showing at circumference as short blunt projections (1 /x high 
about) so that the enveloping membrane usually closely invests the 
spore, chiefly 20-25 fx in length. 
Hosts: Festuca microstacliya , Rocky Mts. (type), Wash.; F. 
tenella, Ida., Mont., Ore., Wash., Wyo. 
Under this name Massee includes this species and Tilletia asperi- 
folia and Tilletia inontaiia. The sorus, however, is considerably 
more elongated than that of either of the others and there are also 
differences in the spores and sterile cells of the three species. The 
germination of none of them is known. Fstilago Mulfordiana is 
sometimes found in the basal parts of the same plants having 
T. fusca in the ovaries. Literature: 72, 73. 
Tilletia asperifolia Ell. & Ev. 
Tilletia asperifolia Ell. & Ev., Journ. Myc., 3 : 55. 1887. 
Soii in ovaries, ovoid, about 1 mm. in length, showing somewhat 
through and between the hyaline enveloping glumes, usually 
occurring in all of the spikelets ; sterile cells hyaline, chiefly ovoid 
to subspherical, with very thick (occasionally even 8 fx ) indistinctly 
laminate walls and central oil or granular contents, large, usually 
25—08 fx in length; spores reddish brown, chiefly ovoid to spherical, 
occasionally more elongated or somewhat angular, with rather 
legulai polygonal reticulations that are about 2—3 fx wide extending 
