Corticium THELEPHORACE.E 415 



1863. C. lividum Pers. (from the livid colour) a b c. 



Effused, closely adnate, between waxy and soft. Hym. even r 

 sometimes rugose or tubercular, somewhat viscid when moist, 

 cracking when dry, variable in colour, clouded pale buff, pale 

 liver or livid azure-blue and fuscous-purplish ; marg. pulverulent, 

 granular or determinate, paler or white. 



Dead birch, elm ; rare. Oct. -June. 5 in. 



1864. C. atrovirens Fr. (from the colour, blackish, shaded greenish; 



ater, black, vireo, to be green) a. 

 Irregularly effused, tomentose beneath. Hym. waxy, smooth, 



pruinose, somewhat pale dull indigo with a greenish shade; 



marg. tomentose. 

 Rotten wood, leaves, sticks ; rare. 3 in. 



1865. C. nigreseens Fr. (from its blackish colour; nigrico, to be 



blackish) a c. 



Effused, interrupted, waxy, agglutinate. Hym. here and there 

 papillose, cracking when dry, yellowish then blackish or 

 brown-whitish to brown-slate, densely powdered with large 

 spores. 



Branches, sticks, under the bark, oak. 3 in. 



1866. C. eomedens Fr. (from its habit of destroying the bark, 



when very thin, under which it grows ; comedo, to consume) 

 a b c. 

 Effused, innate, exposed only when the bark splits. Hym. even, 

 sometimes papillose or finely granular, slightly viscid when 

 moist, cracking when dry and peeling from matrix, flesh-colour, 

 lilac or variegated pale dull buff and pale to somewhat dark 

 purplish. 



Sticks, branches, hazel, alder, hawthorn, chestnut, pine, oak, hornbeam ; 

 very common. Aug. -Mar. 5J in. Never found above the bark. 



LXXXVI. PENIOPHORA Cooke. 



(From the shuttle-like setae, metuloides, or modified cystidia borne 

 on the hymenium ; Gr. penion, a shuttle, phero^ to bear.) 



Resupinate, effused, coriaceous or subcarnose. Hymenium, as 

 seen under a pocket lens, setulose, cystidia projecting, fusiform, 

 colourless, hyaline at first smooth then verruculose above with 

 minute particles of oxalate of lime, which are derived from water 

 containing this substance in solution. The cystidia give the 

 hymenium a velvety appearance, but they sometimes break away and 

 leave the hymenium smooth ; in this condition care must be taken 

 not to confuse the species with Corticium. Basidia tetrasporous. 

 Spores white, hyaline. (Fig. 101.) 



