410 THELEPHORACE/E Corticium 



fibrillose stratum ; without setae or modified cystidia. Spores white. 

 (Fig. ioo.) 



Usually growing on bark and wood, sometimes on sawdust, earth, 

 fir-cones, stems of herbaceous plants, leaves, moss, etc. Some species 

 are phosphorescent. Young examples of some species of Corticium 

 may readily be confounded with Pezizce. The hymenium of some 

 species occasionally exhibits pale rose-coloured to deep crimson 

 stains caused by the presence of a parasitic mould, Hypomyces 

 rosellus. Species 1832—1866 



Marginate, margin free, determinate. 1832 — 1837 



Margin usually indefinite, byssoid, strigose, pulverulent or 



mucedinous-clouded. 



Hymenium white, or ochreous. 1837a — 1851 



Hymenium brightly coloured. 1852 — 1864 



Amphigenous, very thin, innate, throwing off the bark. 



1865, 1866 



1832. C. salieinum Fr. (from the habitat, willow, salix) a c. 

 Coriaceous, soft, rigid when dry, small, fixed by centre. Hym. 



somewhat rugulose, becoming finely but sparingly cracked, 

 deep claret-crimson ; marg. reflexed all round, villous, white or 

 pale rose. 



Gregarious. Willow, rarely poplar. Aug. -Sept. 5-1 in. Resembles a 

 Peziza. 



1833. C. amorphum Fr. (from the supposed ambiguous structure of 

 the hymenium ; Gr. a, without, morp/ie, form) a b c. 



Somewhat coriaceous, small, waxy-pliant, cup-shaped then 

 flattened. Hym. white- grey- or yellowish-umber ; marg. 

 white. 



Gregarious. Silver fir, larch. Aug.-Nov. £-§ in. Resembles a Peziza. 

 This is Peziza amorpha Pers., Thelephora amorpha Fr. It grows in company 

 with Peziza calycina, with pallid examples of which it may be easily 

 confounded. When dry the Corticium and Peziza resemble each other 

 closely. 



1834. C. evolvens Fr. (from the habit, as of new plants emerging 



from the margins of older ones ; evolvo, to unroll) a b c. 



Soft, cup-shaped to effuso-reflexed, gregarious, becoming con- 

 fluent. Hym. somewhat rugose or tubercular, cracking, pale 

 sienna, clouded darker or pale yellowish-brown. 



Bark, cherry, willow, poplar ; frequent. Oct. -April. 5-if in. 



1835. C. porosum B. & C. (from the pore-like markings on parts of 



the hymenium) a. 

 White, becoming pale ochre ; marg. free, reflexed. 



Wood. §-3 in. The "pores" somewhat resemble the true pores of 

 Porot/ieli?im, they are of different sizes and appear as thin dried circular 

 lines, such as are left by minute drops of moisture in drying. 



