46 NEW YORK STATE MUSEUM 



Mitrula gracilis Karst. var. flavipes n. var. 



This dififers from the type simply in having the color of the stem pale- 

 yellow instead of incarnate. Among mosses. Labrador. September, 

 A. C. Wag home. 



(E.) 

 NEW YORK SPECIES OF COLLYBIA. 



Collybia Fr. 



Pileus slightly fleshy, neither sulcate-plicate fior corrugated, the margin at 

 first involute. Lamellae membranaceous, soft, free or only obtusely 

 adnexed. Stem hollow or stuffed with a pith, cartilaginous or with a carti- 

 laginous cuticle, radicating. 



Fungi growing on wood, leaves, etc., also on fungi, but often radicatitig 

 and terrestrial, not withering or drying tip. 



This is the description given by Fries in Epicrisis p. 81 and in 

 Hymenomycetes Europaei, p. 109. 



In Icones Selectee Hymenomycetum,vol. i,p. 61, he has given a modified 

 description of the genus, attributing to it the following characters: 



" Pileus more or less fleshy, convex or plane, the margin at first in- 

 volute. Lamellae free, adnexed or adnate, never decurrent. Stem 

 cartilaginous, commonly radicating. Veil none." 



The genus includes species widely variant in character and appear- 

 ance, for example C. platyphylla and C. stipitaria. In some of its mem- 

 bers it closely approaches several neighboring genera. The large fleshy 

 stemmed forms of C. platyphylla might easily be mistaken for a species 

 of Tricholoma; C. confluens and C. acervata are suggestive of the genus 

 Marasmius; C. ambusta, of Mycena; C. clusilis and C. atratoides of 

 Omphalia, and C. vitcllina and C. misera, of Clitocybe. The genus, 

 therefore, is not very sharply limited, nor are its species in all cases easily 

 referable to their proper systematic place. The thick fleshy stemmed 

 species may be separated from Tricholoma by the naked margin of the 

 pileus and the cartilaginous cuticle of the stem. From Clitocybe the 

 genus differs in the attachment of the lamellae to the stem and in the car- 

 tilaginous character of the latter. From Mycena the incurved margin of 

 the pileus furnishes the chief distinguishing character and from Omphalia 

 the lamellae which are not truly decurrent must separate it. A few of the 

 species revive under the influence of moisture as in Marasmius. These 

 must be separated, if at all, by the more tender substance of the lamellae. 

 The close relationship of these to the genus Marasmius is somewhat per- 



