354 POLYPORACEiE Polystictas 



centre of pileus, sometimes pendulous, at other times hoof-shaped and 

 triangular in section. 



b. Coriacece. 



1600. P. hirsutus Fr. (from the hairy pileus ; hirsutus, hairy) a b c. 

 P. becoming plane, depressed behind, zoned with furrows, vary- 

 ing white, pale slate-brown or brassy-yellow ; z. yellowish- 

 brown. T. long, deep, ochreous-white. Po. torn, whitish- 

 salmon. Flesh thin, corky-coriaceous, colour as T. 



Single to imbricate, effused behind. Dead trunks, branches, willow, oak, 

 beech, poplar, plum. Oct. -Mar. P. if in. diam. Pores much larger 

 than in 1603. 



1601. P. velutinus Cooke (from the velvety pileus ; velluetum, velvet) 



a b c. 



P. plane, slightly zoned, white to ivory-ochreous ; marg. white. 



T. short, white. Po. minute, white to yellowish ; marg. 



barren. Flesh corky-coriaceous, white. 



Single to connato-imbricate. Stumps, branches, etc., willow, beech, fir, 

 birch ; uncommon. Nov. Group 2f in. diam. P. \\ in. diam. 



1602. P. zonatus Fr. (from the zoned pileus) a b c. 



P. convex, tubercular-gibbous behind, villous ; z. unicolorous to 

 varying ivory, ochre, brown, rufous, sienna, etc., or whitish- 

 yellow, graduated and zoned sienna. Po. minute, biscuit. 

 Flesh corky-coriaceous, yellowish-white. 



Single to subimbricate. Trunks, elm, poplar, birch. June-Oct. 

 P. 3 \ in. diam. 



1603. P. versicolor Fr. (from its variable colours) a b c. 



P. even, velvety, shining pale smalt-blue, sooty-slate, or of 



various tints of ochre, ivoiy, brown or greenish. T. shallow. 



Po. minute, ivory ; marg. barren. Flesh thin, rigid-coriaceous, 



ivory. 



Imbricate. Dead wood, fences, branches, encircling twigs, back of an old 

 brush, oak, willow, alder. April-Feb. P. $\ in. diam. The tubes are 

 sometimes bright orange or vermilion from the growth of a parasitic 

 mould, Hypomyces aurantius. When growing on sticks, if the stick is 

 inverted, a new hymenial surface with pores will appear on the downward 

 pileus. Pores sometimes wholly eaten away by insects. 1774 sometimes 

 grows on this. Var. fiiscatus Mass. P. brown. Po. torn into teeth, 

 yellow. 



1604. P. abietinus Cooke (from its habitat, fir-trunks ; Abies, fir) a b c. 

 P. villous, white, zoned dove-grey ■ marg. sometimes purplish. 



T. very shallow. Po. unequal, pale slate, becoming pale 



brown to vinous- or purplish-sienna. Flesh very thin, pale 



brown. 



Connato-imbricate, effuso-reflexed. Fir, cedar, cypress ; common. Jan. -Nov. 

 Group 3^ in. diam. Pileus frequently overgrown by green algae. Some- 

 times wholly resupinate with a broad white woolly margin. Must not 

 be confounded with 1610. 



