680 



THE AGARICACEAE OF MICHIGAN 



(f) Stem streaked with blackish fibrils, elastic; pileus smoky- 

 brown. 752. T. melaleucum Fr. 

 (ff) Stem covered with a cinereous pulverulence, soft; pileus 

 gray. T. humile Fr. 

 (AAA) Pileus neither viscid nor hygrophanous. 

 (a) Pileus white or whitish at first, disk often with tints of other 

 colors, 

 (b) Taste acrid, bitter or unpleasant (often tardily), 

 (c) Gills becoming dingy flesh color. 751. T. panoeolum var. car- 



spitosum Bres. 

 (cc) Gills white or whitish, not becoming dingy incarnate in age. 

 (d) Stem stuffed or hollow; pileus with grayish-brown disk; 



taste and odor strong, unpleasant. T. terreolens Pk. 

 (dd) Stem solid, 

 (e) Gills broad; pileus minutely scaly; taste slowly acrid or 

 unpleasant, 

 (f) Pileus with ochraceous. drop-like scales on disk. 



726. T. nobile Pk. (T. serratifolium Pk.) (See also 

 T. venenatum Atk.) 

 (ee) Gills not broad; pileus glabrous. 



(f) Taste very bitter; gills narrow and crowded. 743. T. 



acerbum Fr. 

 (ff) Taste tardily acrid; gills medium broad and close. 742. 

 T. album Fr. 

 (bb) Taste mild or farinaceous, 

 (c) Stems connately joined at base or several growing from a 

 thick fleshy mass, 

 (d) Pileus mottled with reddish scaly spots. T. albellum Fr. 

 (dd) Pileus mottled with watery spots. 741. T. iinif actum 

 Pk. var. 

 (cc) Stems simple or subcaespitose. 



(d) Pileus small; gills broad; stem solid; taste farinaceous. T. 



silvaticum Pk. 

 (dd) Pileus usually more than 2-3 cm. broad, 

 (e) Odor and taste farinaceous, 

 (f) Pileus large, 8-12 cm., scaly with brownish scales; spores 



9-11 x 6 micr. T. grande Pk. 

 (ff) Pileus 3-6 cm., glabrous; spores 6-8 x 3-4 micr. 745. T. 

 Jeucocephalum Fr. 

 (ee) Odor and taste mild. 



(f) Stem rooting and tomentose at base. T. lascivum Fr. 

 (ff) Stem not rooting. {Clitocybe Candida Bres. may be 

 sought here.) 

 (g) Margin of pileus with short, radiating ridges; gills 



narrow and crowded. 744. T. laterarium Pk. 

 (gg) Margin even, 

 (h) Gills rather broad. 



(i) Plant pure shining white, but without a separate 



pellicle. 727. T. columbetta Fr. 

 (ii) Plant dingy whitish, pileus fibrillose-scaly. 725. 



T. venenata Atk. 

 (iii) Plant whitish, caespitose. (See 774. Clitocybe 

 multiceps.) 

 (hh) Gills narrow and crowded, pileus not pure white; 

 stem striate. (See 813. Collybia albiflavidum Pk.) 

 (aa) Pileus yellow, yellowish or smoky-yellowish. [See also (aaa).] 

 (b) Growing on wood; edge of gills flocculose. 

 (c) Pileus yellow beneath the dark reddish scales. 724. T. ruti- 



lans Fr. 

 (cc) Pileus pale yellow, slightly silky. T. flavescens Pk. 

 (bb) Growing on the ground, 

 (c) Odor strong of coal tar, etc., disagreeable or farinaceous. 



