406 THELEPHORACEiE Stereum 



1813. S. vortieosum Fr. (from a fancied resemblance in the habit 



to waves in a vortex or whirlpool) a b. Coriaceous. 



P. effuso-reflexed, imbricate, obscurely zoned, rugose, strigose, 

 crisped, pale buff; marg. white. Hym. smooth, somewhat 

 ribbed, salmon, or purplish-salmon, sometimes orange shaded. 



Beech. 4§ in. Intermediate between 1806 and 1808. 



1814. S. rufum Fr. (from the rufous pileus) a b c. Rigid, coriaceo- 



cartilaginous. 



P. effuso-reflexed, rugose-rough, deep vinous-brown, with pale 



yellowish marg. and white edge. Hym. minutely cracked, 



grey-pruinose. 



Dead pine, ash, poplar. Sept. -Mar. t>2 in - Effused and immarginate 

 when young. 



b. Resupinatce. 



1815. S. Pini Fr. (from the habitat, pine bark) a b c. 

 Coriaceous-cartilaginous, adnate as a shield, marginate, smooth 



beneath, at length bullate. Hym. noduloso-rough, purple 



flesh-colour, then fuscous, deep sienna or deep vinous-brown. 



On Scotch fir. Nov. T>i m - Sometimes identical in colour with the pine 

 bark and easily overlooked. 



1816. S. frustulosum Fr. (from the habit, breaking to fragments; 



frustrum, a piece) a c. 



Woody, tubercular, thick, crowded and subconfluent, breaking to 



fragments, smooth beneath, and at the obsoletely marginate 



circumference. Hym. convex, pruinose, blackish-brown, 



cinnamon, becoming salmon. 



Wood and bark, oak, beech, branches, hard to rotten sticks. i\ in. ; 

 frustules \ X T 3 5 in. 



1816a. S. quereinum Potter (from the habitat, oak, quercus) a. 



Coriaceous, at first filling in between crevices of bark. Hym. 

 slightly papillose, young examples with a central papilla, pale 

 buff, becoming cinnamon-whitish ; marg. slightly raised from 

 matrix, dark brown, finely zoned beneath, edge lighter. 

 Abundant white mycelium in and under bark. 



Oak bark. Jan. -Nov. 2§ x \\ in. 



1817. S. aeerinum Fr. (from its usual habitat, maple branches ; acer, 



maple) a b c. 



Crustaceous, adnate, effused, even, usually smooth, sometimes 



minutely nodulose or rugoso-rough, often transversely cracked, 



white, pale brownish- white or ivory. 



Maple, fir, juniper, elm. Dec. 4.5 in. A slight repand hirsute pale-yellowish 

 margin or pileus is sometimes developed. 



1818. S. stratosum B. & Br. (from the stratose habit) a. 



Stratose, the pallid strata at length separating, effused, smooth, 

 here and there wrinkled, bright ochreous-white, becoming 

 yellow. 



3i in. 



