370 BRITISH FUNGI 



P. cristaius. — Forming large tufts. Stem white, stout, 1-2 in. 

 long, irregularly branched, bearing a ^'ariable number of pileoli 

 2-3 in. across, rufous with a decided green tinge ; pores whitish, 

 angular, irregular. 



Known amongst the branched, brittle species by the greenish 

 colour of the pileus. Pores more or less tinged green \\hen broken. 



On trunks, stumps, etc. 



P. giganteus. — Consisting of many overlapping large flaps or 

 pileoli which are very broad, limp, slightly zoned and streaked, 

 depressed behind, pale, then brownish yellow, surface granulated 

 with minute dark squamules ; stem much branched, springing from 

 a tuberous base ; pores minute, pallid, roundish, becoming darker 

 at once when bruised. 



Recognized by the large, overlapping j^ellowish brown flaps, 

 and the pale pores becoming dark when bruised. Our commonest 

 species of this group. 



At the base of trunks, forming tufts 1-2 ft. across. 



P. acanthoides. — Overlapping ; pliant when growing, then firmer, 

 pileoli infundibuliform, edge lobed, 2-5 in. across, rusty or pale 

 chestnut, wrinkled, smooth ; stem variously branched, narrowed 

 downwards, pale, then reddish ; pores more or less decurrent, 

 whitish, then tinged rufous. 



Distinguished by the much-depressed pileoli. 



On trunks, stumps, buried wood, etc. 



P. sulfureHS (PI. XXVIII, fig. 2). — Horizontal and attached 

 by a broad base, usually many overlapping pileoli, pale flesh-colour 

 with a yellow tinge, or yellow ; pores up to J in. long, plane, sulphur- 

 yellow. Smell very strong and unpleasant. 



Pileoli often wavy, known by the bright sulphur-coloured pores 

 and very unpleasant smell. 



On trunks. 



P. herhergii. — Tufted, 4-8 in. across, soft and corky, pileoli over- 

 lapping, bright rusty-bay, becoming sulphur-yellow towards the 

 edge ; pores wavy, pale grey. 



Minutely velvety, soft to the touch. 



On trunks. 



P. alligatus. — Usually composed of tufted, overlapping pileoli, 

 1-3 in. across, fragile, dingy tan-colour, minutely velvety ; pores 

 soft, white. 



Variable. No distinct stem present, pileoli often circular in 

 outline, wavy. 



On roots. Often involving twigs, grass, etc. 



P. heteroclitiis. — Tufted, leathery, pileoli springing from every 

 side of a hard tubercle, lobed, downy, yellowish, then brownish orange, 

 1-2 J in. across ; tubes elongated, irregular, yellow, then brownish. 



On the ground, growing from stumps, roots, etc. 



