648 NEW YORK STATE MUSEUM 



Tricholoma acre Pk. 



Thin woods. Karner, Albany co. October. This mushroom has the 

 not peppery taste which belongs to many species of Lactarius and 

 Russula. 



Clitocybe eccentrica Pk, 



Decaying wood. Meadowdale, Albany co. and North Elba. August. 



In this species the stem is frequently eccentric. It is usually adorned 

 with a coarse strigose villosity at the base and long branching strands of 

 white mycelium permeate the soft decaying wood. , 



Marasmius acerinus n. sp. 



Pileus thin, submembranaceous, convex, umbilicate, subglabrous, 

 sulcate-striate, pale bay red; lamellae broad, distant, adnate, tough, 

 whitish or yellowish white; stem short, often curved, inserted, hollow, 

 clothed with a minute short whitish pubescence, colored like the pileus 

 or sometimes a little darker; spores subelliptic, .0003 in. long, .00016 

 broad, usually with an oblique apiculus at one end. 



Pileus 3 to 6 lines broad; stem 6 to 9 lines long, scarcely i line thick. 



Dead bark of mountain maple, Acer spicatum. Near Adirondack 

 lodge. August. . 



Closely allied to M. viticola B. & C, but it is a smaller plant with- a 

 paler and scarcely glabrous pileus and with comparatively broader 

 lamellae. To the naked eye the stem appears to be slightly pruinose, 

 but under a lens it is seen to be thinly clothed with minute short whitish 

 hairs. These also appear to some extent on the pileus. 



Clitopilus socialis n. sp. 



Pileus thin, convex, deeply umbilicate, grayish brown; lamellae thin, 

 moderately close, decurrent, colored like the pileus when young, grayish 

 incarnate when mature ; stem equal, stuffed or hollow, colored like the 

 pileus or a little paler; spores irregular, uninucleate, generally a little 

 longer than broad, .0003 to .0004 in. long, .00024 to .0003 broad. 



Pileus 6 to 10 lines broad; stem 6 to 12 lines long, i to 2 lines thick. 



Closely gregarious. Under pine and hemlock trees. Delmar. 

 September. 



^ This species is well marked by its deeply umbilicate pileus. It is 

 apparently related to C tmdatus, but the pileus is not at all undulate, its 

 color and the shape of its spores are different and its closely gregarious 

 mode of growth will also distinguish it. The plants are sometimes 



