12G FUNGUS-FLORA. 



panded, moist, very smootli and even, dark obscure green 

 when moist, pale grey or whitish, when dry; gills narrow, 

 crowded, thin, margin rather undulate, dingy, slightly 

 adnexed, separated from the flesh of the pileus by a dark 

 cartilaginous line, a continuation of the outer portion of 

 the stem ; spores subpiriforin, 6 X 3 /x ; stem cartilaginous, 

 spongy, stuffed, becoming imperfectly hollow, tapering 

 upwards, minutely striate, 11-2 in. long, | in. thick at base, 

 pale clear brown, darkest below. 



Agaricus (^Collyhia) hibidosus, Massee. 



On stumps. In groups of 2-4, pileus very bibulous, 

 changing from blackish green to pale grey during drying. 

 Often rooting into the wood. Allied in many points to 

 Collybia hutyracea. 



Collybia xylophila. Fr. 



Pileus 2-3 in. across, flesh thin, fragile ; campanulate, lax 

 then expanded, broadly gibbous, glabrous, disc brownish- 

 tan becoming whitish towards the margin ; gills adnate, 

 closely crowded, very narrow, white ; stem about 2 in. long, 

 2-3 lines thick, equal, not quite straight, fibrillosely striate, 

 whitish; spores elliptical, 4 X 2'5 /x. 



Agaricus (^Collijhia) xijlopJiilus, Fries, Monogr., ii. p. 289; 

 Cke., Illustr., pi. 202 ?; Cke., Hdbk., p. 65. 



On rotten trunks, elm, &c. 



Cooke's figure differs very materially from that of Fries, 

 Icon., t. 63, f. 2. 



A very fine species, usually densely caespitose. Stem 

 hollow, 2-3 in. long, 3 lines thick, equal but often flexuoso, 

 fibrillosely striate, whitish, brownish inside. Pileus ample, 

 campanulate, broad, up to 3 in. across (up to 4 in. when ex- 

 panded), usually obtuse, sometimes with a small but true 

 umbo, and when much expanded broadly gibbous, glabrous, 

 whitish or the centre brownish-tan. When much ex- 

 panded the margin is cracked and split. Flesh everywhere 

 very thin, fragile, watery-brown. Grills adnate, often with 

 a small decurrent tooth, very narrow, a line broad at most, 

 very much crowded, edge entire. (Fries.) 



G. confluens and C. ingrata differ in having the stem downy 

 or pulverulent. 



