THE AGARICACEAE OF MICHIGAN 



■ t t ' i 



SPORES broadly-elliptical to subglobose, not angular, minute, 6-7 x 

 5-6 micr. in diameter, pale flesh color in mass. CYSTIDIA more 

 or Less numerous on the edge of the gills, clavate to elliptical, some- 

 times hair-pointed, hyaline, 50-00x10-15 micr. ODQE and TASTE 



qo1 marked. 



Scattered. On rotten logs. Bay View, Houghton. Aim Arbor. 

 July-September. Frequent in hemlock or tamarack woods, mixed 



wiili maple or birch. 



This little Leptonia is partial to rotten wood. Its finely striate, 

 granulose pileus reminds one of some of the small species of Pluteus 

 ; uh1 it approaches that genus also in its smooth spores and clavate 

 cystidia. The gills are slightly adnexed or, in expanded specimens, 

 they may he free, and the stem is subcartilaginous. It seems to 

 form a connecting link between Leptonia and Pluteus. 



**Gills yellowish-tinged. 



618. Leptonia formosa Fr. 



Syst. Mycol., 1821. 



Illustration: Fries, Icones, PL 98. 



PILEUS 1-.". cm. broad, convex then plane and umbilicate. ijellow- 

 wax color, covered with minute fuscous squamules, margin striate. 

 FLESH thin, yellow, toughish, membranaceous. GILLS adnate, 

 with a tooth, rather broad, subdistant, tinged yellow then flesh color, 

 edge entire, concolor. STEM 4-5 cm. long, 1.5-2 mm. thick, strict, 

 equal, cartilaginous, stuffed then hollow, yellow, glabrous, shining, 

 strmtulate. SPOKES tuberculate-angular, rather rectangular in 

 outline, 10-12x6-7 micr.. apiculus oblique, flesh color. CYSTIDIA 

 none. (Mini: and TASTE mild. 



Scattered. In low, swampy woods of hemlock, etc., in northern 

 Michigan, in maple and elm woods in southern Michigan. July- 

 September. Throughout the State. Frequent locally. 



Easily recognized by the yellow cast to the whole plant and the 

 striate and squamulose pileus. Fries says "scarcely different from 

 /,. dsprella except in color." This is borne out by the fact that it 

 is subhygrophanous, which makes it difficult to place not only this 

 but other swamp species in the non-hygrophanous section.. 



