CLASSIFICATION OF AGARICS 697 



gills may remain almost white, or there may be an ashy tinge in 

 all parts of the plant. Several characters set-in to be constant in 

 our plants, viz. the fragility, the nucleated narrow spores, and the 

 fibrous nature of the interior of the stem. I>v these characters and 

 the taste it is separable from V. acre. Authors give various shapes 

 and sizes for the spores, which fad indicates thai there are several 

 independent species a1 present not separated. Bresadola has segre- 

 gated a dark, scaly species whose spores measure 7-9 x l-~> micr., as 

 T. squarrulosum. T. scalpturatum (Fr.) Bres. has a well-developed 

 bin evanescent cortina at first; this approaches our form, and has 

 the same spores, hut lacks the distinct farinaceous odor. < ►in- 

 typical plants had no sterile cells on the edge of the gills. A form 

 found at New Richmond had short cystidia and .uills whose edges 

 were minutely flocculose and spotted with drab-color, darker than 

 the rest of the gills. Peck has named our form with the farinaceous 

 odor var. fragans. The farinaceous odor seems to be the most com- 

 mon character of the American form of T. terrewm. 



733. Tricholoma fumescens Pk. 



X. Y. State Rep. 31, 1879. 



Illustration: Hard. Mushrooms, Fig. 54. p. 75. 



PILETJS 2-6 cm. broad, convex-plane, regular at first, then un- 

 dulate, obtuse, dry. covered with <i minute, appressed tomentum, 

 whitish to pale grayish-brown, darker where handled, even, margin 

 at first incurved. FLESH rather thin. (JILLS rounded behind 

 at first, then acuminate adnexed, narrow, very crowded, whitish. 

 changing to bluish-black in age or when bruised, easily separable 

 from trama of pileus. STEM 2-6 cm. long, 5-10 mm. thick, short, 

 rather stout, whitish then brownish, solid, becoming cavernous and 

 splitting, pruinose at apex. SPORES narrow, subfusiform-ellipti- 

 cal, 5-6.5x3 micr.: sterigmata prominent. 3-4 micr. long. ODOR 

 and TASTE slightly farinaceous. 



Gregarious or subcaespitose. On the ground, in low, frondose 

 woods. .Jackson. Ann Arbor. September-October. Infrequent. 



Recognizable by the narrow, crowded gillSj which become bluish 

 black in fresh specimens if bruised: in age <>r when dried the} are 

 almost as black as old ^ills of Agaricus campestris. The pileus 

 and stem do not change as much, inclining to brownish, and in this 

 differ markedly from T. fuligineum. The latter also possesses 



