392 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
together rather firmly and those of interior in groups, chiefly sub- 
spherical, smaller to larger than the spores ; spores reddish brown, 
ovoid to chiefly subspherical or spherical, sometimes angled, often 
apparently smooth but really very minutely verruculose, 9-13 p. in 
length. 
Hosts: Andropogon hirtifolius var. pubiflorus, Mex. (type); 
A. saccharoides, Ariz., Mex. (type IT. Andropogonis-saccharoidis). 
This species differs from Sphacelotheca Ischaemi , to which it is 
very closely related, in the somewhat larger spores which are always 
very minutely verruculose. Ustilago Andropogonis-saccharoidis 
does not seem to merit specific distinction and so has been placed 
by the writer with this species. The only apparent difference is 
that being on a different host it sometimes develops a more promi¬ 
nent sorus. This species has not been germinated. 
Sphacelotheca Montaniensis (Ell. & Holw.) Clint. 
Ustilago Montaniensis Ell. & Holw ., 1 Ell. & Ev., N. A. Fungi, 2263. 1889. 
Sphacelotheca Montaniensis Clint., Journ. Myc., 8 : 141. 1902. 
Exsiccati : Ustilago Montaniensis Ell. & Holw., on Muhlenbergia sp. 
Ell. & Ev., N. A. Fungi, 2263. 
Sori in the inflorescence (more rarely in the individual spikelets 
and then smaller), usually enveloped by the leaves, elongated, 
chiefly 10-15 mm. in length, protected by evident whitish false 
membrane, with small flattened columella; sterile cells of mem¬ 
brane and interior hyaline, thick-walled, chiefly subspherical, adher¬ 
ing in irregular groups that are easily separated into individual cells, 
usually smaller than the spores; spores dark reddish brown, chiefly 
ovoid to subspherical, echinulate (sometimes rather bluntly), 12-15 p 
in length. 
Hosts: Muhlenbergia glomerata , Mont.; M. glomerata var. 
setiformis , Mont.; Muhlenbergia sp., Mont. (type). 
In the exsiccati this species was issued with Ellis and Holway as 
the authority, but in the later printed description, apparently 
through oversight, Ellis and Everhart is the authority given. This 
species has not been germinated. 
Sphacelotheca strangulans (Issat.) Clint, n. nom. 
Ustilago strangulans Issat., Par. Pilze Gouv. Cherson, 225. 1896. 
1 Described in Journ. Myc., 6: 119. 1891. 
