764 THE AGARICACEAE OF MICHIGAN 



Section II. Laevipedes. Putrescent; not hygrophanous ; stem 

 glabrous, not conspicuously striate. 



812. Collybia albiflavida (Pk.) (Edible) 

 N. Y. State Mus. Rep. 23, 1872 (as Tricholoma albiflavidum). 



PILEUS 5-12 cm. broad, convex-expanded, then depressed, obtuse 

 or slightly umbonate, umbo subobsolete and darker, moist, whitish 

 or creamy-yellow, even, glabrous, margin at first involute. FLESH 

 white. GILLS adnexed-emarginate, narrow, crowded, thin, white 

 or whitish, edge entire. STEM 6-18 cm. long, 5-8 mm. thick, equal 

 above the bulbous base, solid', fibrous within, cuticle cartilaginous, 

 whitish. SPORES elliptical, smooth, obtuse, 7-10x4.5-5.5 micr., 

 white in mass. CYSTIDIA lanceolate, scattered or infrequent on 

 sides of gills, often crystallate at apex, 55-65 x 10-15 micr. ODOR 

 and TASTE none. 



Solitary, gregarious or subcaespitose. On the ground in frondose 

 or coniferous woods, among fallen leaves. Throughout the State. 

 June-September. Frequent. 



This noble plant is found frequently, especially in moist ravines 

 of most kinds of woods. It was referred by Peck to Tricholoma, 

 where he considered it close to T. lascivum. Collectors nearly al- 

 ways mistake it for a Collybia, and this tendency is given a basis 

 because of the presence of cystidia on the gills, and by the nature 

 of the stem, whose rind is cartilaginous. The plant presents a stiff 

 appearance due to the straight and rather rigid-elastic stem. It 

 sometimes attains a much larger size than the original description 

 indicates. A form occurs in low, wet or swampy places, with simi- 

 lar habit and structure, but smaller and darker in color. The color 

 is almost smoky-brown, and the general appearance suggests a 

 form of Tricholoma melaleucum ; its microscopic details, however, 

 agree with the above species ; its pileus is 2.5-5 cm. broad. T. albi- 

 flavidum has a disagreeable odor at times, but this may disappear, 

 especially after it is picked and left overnight. 



813. Collybia abundans Pk. (Edible) 



N. Y. State Mus. Rep. 29, 1878. 

 Illustration : Plate CLXVI of this Report. 



PILEUS 1-3 cm. broad, convex or nearly plane, subumbilicate, 



