412 THELEPHORACE^: Corticium 



1843. C. Iseve Pers. (from the even hymenium ; /avis, even) a b c. 

 Effused, membranous, separating from matrix. Hym. even, 



smooth, rarely papillose, commonly with vacuoles exposing 

 the wood, cracking, white to sienna-yellowish, flesh-colour, 

 livid, salmon or pale red ; marg. sometimes broad, edge pilose, 

 ivory to white, sometimes with radiating strands of white 

 mycelium. 



Wood, bark, sticks, pine, poplar, birch, alder, oak ; very common. Nov.- 

 May. 8 in. Some conditions resemble 1770. 



1844. C. eonfluens Fr. (from the habit forming confluent patches) 



a b c. 



Agglutinate, submembranous. Hym. even, naked, cracking, 

 somewhat concentrically rugose when young, hyaline becoming 

 white, lavender-brown-white, yellowish-brown, pale brownish 

 or pale rose-purple ; marg. spreading in a dentate manner. 



Bark, beech, alder, ash, willow. Mar.-Aug. f-3 in. 



1845. C. nudum Fr. (from the hymenium becoming bare, nudus) 



a b c. 



Waxy, agglutinate, very thin, becoming rigid. Hym. flesh-colour, 

 white-salmon, umber-ivory or yellowish-buff, clad with 

 fugacious white meal, cracking when dry ; marg. determinate, 

 smooth. 



Dead wood, bramble, alder, yew, willow. Aug.-April. -4$ in. 



1846. C. arachnoideum Berk, (from the mycelium like spider-web ; 



Gr. arachne, a spider) a b c. 



Very thin, effused, delicately flaxy. Hym. waxy, continuous or 

 somewhat papillose, somewhat cracked when dry, white or 

 faintly clouded sulphur, yellowish or brownish, floccose be- 

 neath ; marg. white-fibrillose. 



Wood, bark, oak, pine, twigs, leaves, grass, lichens, etc. Oct.-Mar. 7 in. 



1847. C. radiosum Fr. (from the radiate habit) a b c. 

 Membranous, subrotund with radiate lobes. Hym. smooth, 



glabrous, irregularly papillose, cracking when dry, primrose- 

 white to dark ochreous or buff, adpressedly fibrillose beneath ; 

 marg. fibrilloso-radiate, often with long strands of mycelium. 

 Elm, birch, pine, hornbeam, naked wood. Oct. -Feb. 4^ in. 



1848. C. Typhse Flick, (from the usual habitat, bulrushes ; Typha, a 



bulrush) a b c . 

 Longitudinally effused, thin, at first forming white byssoid spots, 



smooth then mealy, cracking when dry, ivory to tan ; marg. 



usually ragged or ill-defined. 

 Dry leaves of Typha latifolia and species of Carex. \\ in. 



1849. C. Sambuci Pers. (from the habitat, elder, Sambucus) a b c. 

 Broadly effused, indeterminate, encrusting, somewhat innate, 



cracking and breaking into floccules when dry, white. 

 Very common. Aug. -May. 7 in. Sometimes forming hyaline- whitish 

 spotty cloud-like growths. 



