TILLETIA TEXANA IN MISSOURI 
H. R. ROSEN 
Rufus J. Lackland Fellow in the Henry Shaw School of Botany of 
Washington University 
While looking over smut collections in the herbarium of the 
Missouri Botanical Garden the writer came upon a collection 
on a wild grass, Hordeum pusillum Nutt., common in Missouri 
and in adjoining regions, which is of particular interest. This 
smut has apparently been reported only once before, from Texas, 
the type locality, and since the original description was based on 
but one collection a brief description of the Missouri material 
should be of some assistance in fixing the identity of this species 
as well as calling attention to a new host and a new locality. 
This smut is of the covered type, the glumes remaining intact 
while the ovule is more or less completely replaced by the spore 
mass, and, like other smuts of the covered type, is apt to be 
overlooked. It was collected by C. H. Demetrio, near Emma, 
Saline County, Missouri, on June 20, 1896, and it is worth noting 
that while the host of the type collection is Hordeum nodosum L. 
(H. pratense Huds.) the collection under discussion is on H. 
pusillum. 
Clinton's description of Tilletia terana Long (Jour. Myc. 8: 
149. 1902), appearing also in the same author's monograph of 
the North American Ustilaginales, portrays well the collection 
at hand. The following additional notes may be of interest. The 
attacked ovules are considerably enlarged, often assuming two 
or three times the width of the normal kernels, and instead of 
appearing straw-colored they are of a grayish green external 
appearance.  Internally they present an agglutinated light- 
reddish brown spore mass, as Clinton states. His description of 
the spores, including color, shape, markings, size, etc., might 
have been written for the Missouri material. I find the same 
characters that he describes. In addition it should be noted 
that the hyaline envelope is 2.5-3.5 v thick and that many of 
ANN. Mo. Bor. Ganp., Vor. 8, 1921 (357) 
