Fungus Flora of Mi. Hood 



127 



drab" to "avellaneous" (R.), umbo ''sayal-brown" (R.), be- 

 coming somewhat paler when dry, margin thin, substriate, split- 

 ting radially in age, acute, soon spreading; flesh thin, concolor. 

 Gills narrowly adnate, soon sinuate and decurrent, rather nar- 

 row, and narrowed in front to a point, 3-6 mm. broad, whitish 

 with indistinct gray tints, close to subdistant, here and there 

 intervenose. Stem 4-8(10) cm. long, 3-5 mm. thick, slender, 

 'equal, abruptly dilated at apex, sometimes twisted, hollow, terete 

 or compressed-furrowed, glabrous and naked, entirely even, 

 tough-cartilaginous, almost horny, "wood-brown" to "avella- 

 neous" or darker, white-substrigose at the very base. Odor and 

 taste entirely lacking. Spores broadly elliptical, smooth, hya- 

 line, 8-9(12) X 5-7(8) fx, variable; basidia 4-spored, 32-34 x 5- 

 6 fJL] cystidia none; sterile cells on edge of gills oval, short and 

 indistinct. 



Always on decayed logs or wood remains of conifers, ces- 

 pitose or subcespitose. Common. Mt. Hood, Oregon. October 

 3. Collected by C. H. Kauffman. 



It belongs to the section Tephrophanae, although neither the 

 hygrophanous character, nor the gray tints of the gills are 

 strongly marked. In its relationship, it verges towards C. lan- 

 cipes Fr., but the stem is not atriate and the gills are not broad. 

 From C. rugosiceps Atk. and C. subrugosa Murrill it differs in 

 the character of its gills and spores as well as in its colors and 

 habitat. It has much the appearance of some of the Tricho- 

 loma melanaleuca group, but lacks cystidia, has different colors 

 and the stem is truly cartilaginous. The surface layer of the 

 pileus is corticate, composed of one or two series of globose- 

 pyriform, brown cells. 



Claudopus byssissedus Fr. 

 Clitocybe amara Fr. 

 Clitocybe atrialba Murrill 

 Clitocybe clavipes Pk. 

 Clitocybe decora Fr. 

 Clitocybe ectypoides Pk. 

 Clitocybe gallinacea Fr. 

 Clitocybe laccata Fr. 



Clitocybe media Pk. 

 Clitocybe nebularis Fr. 

 Clitocybe ochropurpurea 



Berk. 

 Clitocybe pithyophilus Fr. 

 Clitocybe suaveolens Fr. 

 Clitopilus novaboracensis Pk. 

 Clitopilus woodianus Pk. 



