404 BRITISH FUNGI 



Differs from Grandinia in the warts being more distinctly hol- 

 lowed at the tip or apex. 



P. keithii. — Forming thin, inseparable, subgelatinous patches 

 1-2 in. across, pale umber, edge somewhat powdery ; warts scat- 

 tered, short, at length collapsing, centre gelatinous. 



Known amongst British species by the dingy pale umber-colour 

 and subgelatinous consistency when growing. 



On dead fir. 



P. friesii. — Forming effused, thin, inseparable white or pale 

 ochraceous patches of irregular form^ 1-3 in. across, edge sterile, 

 fibrillose ; warts immersed in the substance, perforated at the 

 apex, scattered, yellowish, at length expanded. 



On bark and wood. 



P. confusum. — Patch thin, pallid, waxy-looking and polished, 

 edge downy ; warts scattered, very short, tip excavated. 



On wood, sticks, etc. 



P. stevensoni. — Patch rather thick, somewhat gelatinous when 

 moist, whitish, edge coarsely fibrillose, becoming smooth ; warts 

 distinct, scattered, not I line high. 



When growing each wart is usually crowned by a yellow, limpid 

 globule consisting of resin derived from the wood on which the 

 fungus is growing. 



On decayed pine rails. 



Phlebia 



Rather soft and subgelatinous, resupinate, entire surface 

 covered with irregular, crowded wrinkles or ridges with an even 

 edge. 



Forming rather fleshy, much wrinkled crusts or patches on 

 wood. Often large and brightly coloured. Subgelatinous when 

 moist. 



P. merismoides. — Broadly effused, thin, soft, flesh-colour when 

 moist, becoming dingy and tinged purple, margin fibrous, orange ; 

 wrinkles thin, crowded, not anastomosing to form an irregular net- 

 work, 3-4 in. across. 



The irregularity of the surface depends on the form of the sub- 

 stance it grows upon. 



On bark and wood, running over moss, etc. 



P. radiata. — At first more or less orbicular, edge with radiating 

 fibrils, reddish flesh-colour or almost orange ; folds or wrinkles 

 thin, crowded, radiating from the centre, 3-4 in. across. 



On dead wood and bark. 



P. contorta. — Closely allied to P. radiata, differing in the branched 

 and contorted wrinkles of the hymenium. 



On dead wood. 



