72 NORTH AMERICAN SORDARIACEAE 
riales. Very careful studies have been made of the perithecia to 
determine whether there was not really a functional ostiolum, 
although none was visible; but no evidences were found of any 
difference in the thickness of the perithecium wall at the point 
where we would expect the opening to be found. This character, 
according to the distinctions of the group, would place this imme- 
diately in the Perisporiales. But when the spores are examined 
and their development traced one cannot but conclude that the 
species has very decided relationships to the genus Pleurage. 
Abundance of material has been obtained from the several 
localities. That from Aberdeen produced perithecia comparatively 
few and scattering, and the mycelium was not abundant enough 
to attract much attention. The Tucson specimens, however, pro- 
duced a thick feltwork of mycelium over large areas of the sub- 
stratum, and the perithecia were so numerous as to give their 
characteristic color to the entire culture; indeed the growth was 
so vigorous as to choke out almost everything else. The myce- 
lium is not that produced from the spore, but simply the perithecial 
appendages. The Texas specimens had much the same character- 
istics of growth as those from Arizona. Theage of the Aberdeen 
material may have had something to do with the apparent lack 
of vigor. 
13. Pleurage Ellisiana sp. nov. 
Perithecia scattered, half-sunken or superficial and imbedded 
in a dense growth of brown mycelium, about 300 ×م‎ 500 p, thin 
membranaceous, olivaceous below and brown above, pyriform, with 
papilliform black curved beak which is uniformly and sparingly 
covered with short straight sparingly septate hairs. 
Asci 8-spored, clavate, contracted and rounded above and 
tapering below into a long slender stipe, evanescent, 26-32 4x, 
160-185 :م‎ paraphyses filiform, septate, slightly constricted be- 
low, longer than the asci. 
Spores biseriate, ovate to broadly ellipsoid, ranging from hyaline 
when young through olivaceous to dark brown and opaque, 
11-16 عام‎ 21-27 4 : primary appendages one-half to once the 
length of the spore, cylindrical, straight, both this and the apex of 
the spore tipped with long lash-like gelatinous موی‎ ag the 
upper one being eccentrically attached. (Pl. 5. 
Distinctive characters : Abundant development E mycelium, 
the hairy beak, and the ge characteristics. 
