754 THE AGARICACEAE OF MICHIGAN 



rowly ovate, pointed-apiculate, smooth, white; CYSTIDIA noue. 

 ODOR and TASTE mild. 



Solitary or gregarious. Very common in woods of white pine. 

 New Richmond; infrequent in frondose woods, Detroit, Ann Arbor 

 and Marquette. July-October. 



The "buttery Collybia" is often hard to separate from C. dryophUa 

 by descriptions, and there are probably intermediate forms. The 

 typical plant seems to be limited to coniferous ivoods. The striate 

 stem influenced Fries to refer it to the Striaepedes; but it seems 

 to belong more naturally to this group, from its general appear- 

 ance and the somewhat hygrophanous flesh. The umbo often dis- 

 appears somewhat in age, but the crenulate gills, and striate stem 

 seem quite consistent for the typical plants of conifer woods. The 

 spores of this species and several of those following are practically 

 the same. It is probable that the form in frondose woods is an 

 ecological variety, as it rarely possesses a distinct umbo. 



798. Collybia dryophila Fr. (Edible) 



Syst. Myc, 1821. 



Illustrations: Cooke, 111., PL 201. 



Gillet, Champignons de France, No. 15G. 



Michael, Fiihrer f. Pilzfreunde, Vol. Ill, No. 103. 



Patouillard, Tab. Analyt., No. 315. 



Murrill, Mycologia, Vol. 3, PI. 40, Fig. S. 



N. Y. State Mus. Bull. 122, PI. Ill, 1908 (coloring poor). 



Plate CLN of this Report. 



PILEUS 3-5 cm. broad, convex-expanded, obtuse or depressed, 

 often irregular, even, glabrous, subhygrophanous, color variable, 

 tan, with reddish or yellowish shades, disk darker, sometimes bay- 

 brown, often faded. FLESH white, rather thin and pliant, some- 

 what watery. GILLS adnexed or narrowly adnate, narrow, crowd- 

 ed, whitish or pallid (yellowish in variety), edge entire or minutely 

 crenulate. STEM 3-6 cm. long, 2-1 mm. thick, equal or tapering up- 

 ward, reddish-brown or yellowish-tinged, usually concolor, glabrous, 

 hollow, cuticle cartilaginous, white-mycelioid at base. SPORES 

 5-7 x 3.5 micr., smooth, narrowly ovate, white, CYSTIDIA none. 

 ODOR and TASTE mild. 



Gregarious or subcaespitose. Typical form in hard-wood forests, 

 groves, etc. June to October. (Earliest record. May 28; latest, 

 October 1.) Very common, throughout the State. 



