The Mycologic Flora of the Miami Valley, O. M77 
plants. Pileus + of an inch or less in breadth, stipe 1-3 in. high. One 
of the most tender, fugacious, with a flaccid habit. 
b. Lamelle attached to the stipe or to a distinct collar. 
13. C. pLicaTiLis, Curt.—Pileus very tender, oval-cylindric then 
campanulate, soon expanded and splitting, sulcate plicate, nearly 
glabrous, brown then lavender-cinereous; the disk broad, even, at 
length depressed, darker. Lamelle attached toa collar remote from 
the stipe, gray-blackish. 
On the moist earth along paths in fields and woods. Pileus 4-1 in. 
broad, the stipe 1-3 in. high. Extremely fugacious, disappearing with 
the rising sun; pileus at length plane, nearly naked, umbilicate, gray, 
yellowish-brown in the center; stipe very slender, fragile, smooth, gray, 
tinged with brown, sometimes white, hollow. 
Genus III.—Botsirttvs, Fr. 
Hymenophore somewhat discrete; lamellae membranaceous, soft, 
liquescent, pulverulent from the seceding spores. Spores ovate, even, 
somewhat ferruginous. 
1. B. tiTuBaNs, Bull.—Pileus membranaceous, ovate-campanulate, 
afterward split and explanate, yellow, discoid. Stipe slender, straight, 
yellowish, shining. Lamelle slightly attached, pallid then becoming 
purplish or fleshy-brown. Spores salmon-color, elliptic, .008.004 mm. 
On manure in woodlands. Pileus 1-2 in. in diameter, stipe 3-5 in. 
long. Pileus very delicate and tender at length almost deliquescent. 
This is the only species that has yet been found in our region; I found 
it in July, 1882, and have the figure of the only specimen. 
Genus I1V.—CortInartivs, Fr. 
Veil cobwebby, discrete from the cuticle of the pileus, superficial. 
Hymenophore contiguous with the stipe; lamellz persistent dry, 
changing color, pulverulent from the slowly seceding spores; trama 
fibrillose. Spores on white paper somewhat ochraceous. 
Fungi terrestrial, putrescent, growing in woods. 
Note.—The individuals as well as the species of this vast genus are 
extremely limited in number in the Miami Valley. I have been able to 
make scarcely any additions to the very few species enumerated by 
Mr. Lea. I have figures of a few species as yet undetermined. Speci- 
mens are so scarce that it is difficult to meet with the different stages 
of growth. 
