768 THE AGARICACEAE OF MICHIGAN 



this is of little consequence. Stevenson has incorrectly given the 

 spore measurements as 19 x 13 micr., and Mcllvaine has copied the 

 error. 



817. Collybia maculata A. & S. (Edible) 



Syst. Myc, 1821. 



Illustrations: Marshall. The Mushroom Book, PL 15, op. p. 66, 

 1905. 

 Hard, Mushrooms, Fig. 82, p. 113, 1908. 

 Murrill. Mycologia, Vol. 6, PL 130. 



PILEUS 5-15 cm. broad, compact, convex then expanded, obtuse 

 or broadly subumbonate, glabrous, even, ichite with ferruginous 

 stains or spots, later becoming rusty-red throughout, margin at 

 first inrolled, then waxy or lobed. FLESH white, firm. GILLS 

 adnexed, or nearly free, very narrow, crowded, white or whitish, 

 edge entire. STEM 6-16 cm. long, 6-12 mm. thick, equal or sub- 

 ventricose, attenuated below and praemorsely rooting, firm, carti- 

 laginous, striate or subsulcate, hollow. SPOKES subglobose to 

 short-elliptical, 6 x 3-4 micr., smooth, white. CYSTIDIA none. 



Solitary or subcaespitose. On the ground, conifer or mixed woods 

 of northern Michigan. Isle Royale, Marquette, Houghton, Bay 

 View. July-September. Infrequent. 



The firm, compact flesh, the narrow crowded gills and stained 

 pileus characterize this plant. The pileus is often narrow com- 

 pared with the long and rather stout stem. With age the stains 

 spread and the whole plant becomes reddish. Specimens were 

 found in frondose woods of southern Michigan which approach G. 

 szorconerea Batsch. with cream-colored to ochroleucous gills, and 

 bitterish taste; the spores of this form measured 6x3 micr. The 

 pileus was rufous-tinged or darker on disk. Tricholoma subma- 

 culatum Pk. has smaller spores and a solid stem; otherwise it seems 

 t<> approach some of the variations of Collybia maculata. 



