417 
size. The brighter color of the smaller spores and the stuffed or 
hollow smooth stem of our plant will separate it from this species. 
HyPHOLOMA ATROFOLIUM. 
Pileus submembranous, at first convex or hemispherical, then 
broadly convex, commonly umbonate, minutely and irregularly 
furrowed, striate to the apex when mature, hygrophanous, burnt- 
umber or wood-brown when moist, fading to pale-tawny or cream 
color in drying, veil fugacious ; lamellae subdistant, adnate, at first 
pale-brown or drab, then dark seal-brown, almost black; stem 
slender, fibrillose, hollow, pallid or cream color ; spores very dark- 
brown, elliptical, .oo04 in. long, .0002 broad; pileus 9-24 lines 
broad; stem 12.5 in. long, I-1.5 lines thick. 
Among bushes. Pasadena. January. McClatchie. 
The plants are gregarious or loosely caespitose. The lamellae, 
when mature, are almost black, and on this account the species 
might be sought in the genus Psathyrella, but the form of the 
Pileus indicates a closer relationship to the genus Hypholoma. Its 
hygrophanous character places the species in the section Appen- 
diculata. In some respects it approaches 7. hymenocephalum, 
from which its convex pileus, less close and darker colored lamel- 
lae and longer spores will separate it. 
PSATHYRELLA GRACILLIMA. 
Pileus membranous, convex or nearly plane, finely striate 
nearly to the disk, subhyaline. bluish-white with a pinkish tint, 
the disk yellow and commonly depressed; lamellae thin, close, 
founded behind and adnexed or nearly free, light slate color when 
young, becoming black or variegated with black; stem slender, 
elongated, erect, hollow, whitish or cream colored ; spores oblong- 
elliptical, pointed at one end, .00055 to .0006 in long, .00024— 
‘0003 broad; pileus 6 to 18 lines broad; stem 3-5 in. long, about 
I line thick. 
Damp ground among weeds. Kansas. July. Bartholomew. 
The notes of the collector describe the spores as dark brown, 
but they appear to me when viewed by reflected light to be 
black. The plant is very graceful and fragile. Its relationship 
Seems to be with such species as Psathyrella hiascens, P. trepida and 
P. hydr ophora, from all of which it may be separated by the attach- 
ment of the lamellae. The depressed disk suggests Coprimus 
| : - “icatilis, but the specimens give no evidence of the deliquescence > 
Of the lamellae. | | : 
