G6 
in diameter, covered above with a layer of obovate, subolivaceous, 
rougliisli, substipitate conidia, 7-45/* in diameter, substance of the inner 
and lower part of the sporodochia rose-red. 
The general appearance is that of some erumpent Sphwria. 
Spirerella aquilegiae, n. s. On Aquilegiti Jonesii , Yogo, in the 
Belt Mountains, Helena, Montana. July, 1888, Leg. R. S. Williamson, 
Oom. F. W. Anderson, Ro. 299. 
Perithecia scattered on the leaves and petioles, erumpent, rather 
acutely hemispherical, black, 100-420/*. in diameter, pierced above, and 
more or less distinctly fringed at base with brown creeping threads, 
texture coarsely cellular. Asci obovate-oblong, sessile, 50-G0 by 22- 
25/i, inequilateral, without paraphyses. Sporidia crowded-biseriate, 
subclavate-oblong, hyaline, straight, obtuse, slightly constricted, 20- 
22 by 9-11/1, each cell 1-3-nucleate. Differs from S. pachyasca , Ros- 
trop, which is also found in Montana on Phlox caispitosa , principally in 
its broader sporidia. Perhaps this might be considered a form of that 
species. 
Pleospora laxa, n. s. On dead leaves and culms of some grasses. 
Montana, Anderson, Ro. 348. Perithecia scattered, subglobose, black 
150-170/1. in diameter, their bases projecting on one side of the lamina 
ol the leaf and their apices on the other. Asci few (0-8), in a perithe- 
cium, inflated-oblong, broadly rounded above, and contracted at the 
base into a short stipe, 150-200 by 35-55/i. Paraphyses obscure. Spo¬ 
ridia 8, in an ascus, obovate, oblong, G-8-septate, coarsely muriform, 
deeply constricted near the middle, so as easily to break in two at the 
constriction, straw-yellow, 35-45 by 15-20/1 (mostly 15/i wide). This 
seems to differ from any of the other described species on grasses or 
Carices in its strongly constricted spores. This character is very dis¬ 
tinct through all stages of growth. 
The constriction is generally at the third septum from the upper end 
of the spore, the part above this constriction being broader and shorter 
(often nearly globose) than the part below it. This comes near P. Is- 
landica , Johans, but differs in its more obtuse and deeply constricted 
sporidia. 
Leptosphaeria SPOROBOL 1, 7i. s. On dead culms of Sporoholus de 
paupcralus , Hand Coulee, Cascade County, Mont., August, 4887. F. W. 
Anderson, Ro. 233. 
Perithecia scattered, erumpent superficial subhemispherical, nearly- 
smooth, black, t—J mm in diameter, with a short, thick, nipple-like os- 
tiolum. Asci clavate-cylindrical 75-80 bylG-18/*, with abundant para¬ 
physes. Sporidia crowded-biseriate, overlapping each other, oblong- 
fusoid, ends subobtuse, straight, G-septate, and not at all or finally 
slightly constricted at the septa, about 22 by 7/*, straight or nearly so. 
Differs from L. culmifraga , to which it is closely allied in its shorter and 
quite constantly only G septate sporidia, and from L. cnhnicola in its 
superficial growth. 
