352 POLYPORACE^E Fomes 



length, stratose ; whitish-buff. Po. medium, salmon-white. 

 Flesh colour as T. 



Imbricate. About stumps, posts, roots, squared timber, pine, spruce, fir, 

 larch, juniper, birch, beech, Sequoia gigantea ; very common. Jan.- 

 Dec. P. 7 in. diam. Sometimes wholly resupinate. Some forms of 

 this are Tranietes radiciperda, said to cause " red-rot " and piping in 

 larch, the mycelium growing from the roots to the trunk. Sometimes 

 phosphorescent in mines and seen 20 yards off. The white mycelium so 

 often seen running over the hymenium belongs to Verticillium micro- 

 sperninm, the conidial condition of Hypomyces Broomeanus. 



1594. F. populinus Cooke (from its habitat, trunks of poplar, populus) 



a b c. 



P. rigid, zoneless, rugose, villous, warm-biscuit. T. deeply 

 decurrent, not stratose, shallow. Po. minute, colour as P. 

 Flesh colour as P. 



Nearly solitary to subconnate or imbricate, for the most part resupinate. 

 Aug. -Jan. P. 2j in. diam. Polyporus connatus Weinm. (not Fr.) and 

 1631 are forms of this according to Bresadola ; see 1631. 



LXIV. POLYSTICTUS Fr. 



(From the pores or punctures on the hymenium ; Gr. polns, many, 



stiktos, punctured.) 



P ileus coriaceous, membranaceous or somewhat spongy, cuticle 

 thin and loosely fibrous. Tubes first appearing in the centre and 

 successively developing towards the margin, at first superficial and 



distinct, then becoming deeper 

 and more crowded, not stratose. 

 (Fig. 79.) Species 15951608 



1595, 1595a and 1596 are placed 

 in Polystictus by Cooke and Massee, 

 in Poria by Saccardo. 



a. Stupposce. Pile-its flocculose, 

 or adpressedly villous or 

 smooth, uneven, zoneless, 

 texture fibrous. 

 Substance coloured. 



Fig. 79. Section of Polystictus versicolor Fr. 1595 1597 



Substance white. 1598, 1599 



b. Coriacetz. Pileiis coriaceous, villous, zoned, usually in dif- 

 ferent colours. 16001605 



a. StupposcK. 



1595. P. radiatus Cooke (from the radiato-rugose pileus) a b c. 



P. velvety to smooth, deep rich brown to dull orange; marg. 

 zoned bright sienna. T. colour as flesh. Po. minute, greyish- 



