CORTICIUM. 283 



On dead and decayed pine in woods and cellars. Common. Corticium. 

 Nov. 



Name arid us, dry. Fr. Hym. Enr. p, 659. 5. Alycol. Scot. n. 905. 

 Theleph. Berk. Out. p. 269. C. Hbk. n. 907. 



Subgenus II. HYPOCHNUS. Breaking up and becoming 



floccose, &c. 



* Breaking up and becoming floccose. 



43. C. serum Fr. White, broadly effused, incrusting, thin, 

 fleshy when fresh, smooth, pruinose, then and when dried splitting 

 open intoflocri, papillae round, crowded together, equal. 



A very singular species. Papillae regular. 



On trunks. Epping. Glamis. Menmuir. Winter. 



Spores sphaeroid or ovoideo-ellipsoid, smooth, hyaline or chlorino-hyaiine, 

 9-11 x 7-8 mk. K. Name series, late. Growing in winter. Fr. Hym. Eur. 

 p. 659. B. & Br. n. 1583, 1697. S. Mycol. Scot. n. 906. Theleph. Pers. 

 Syn. p. 580. Fr. Elench. p. 211. 



44. C. sambuci Fr. White, effused, somewhat innate, incrust- 

 ing, surrounding branches, indeterminate, continuous when in 

 vigour, breaking into floccules when dry. 



Easily recognised from its habitat. 



On dried branches of elder. Very common. Aug.-Dec. 



Very difficult to separate from C. calceum by a strict definition. AI.J.B. 

 Name sambucus, elder. Fr. Hym. Eur. p. 660. Berk. Out. p. 276. C. 

 Hbk. ?i. 943. S. Mycol. Scot. n. 907. Grev. t. 242. Letell. t. 607. f. 2. 



** Hymenium tomentose, somewhat pulverulent. 



45. C. olivaceum Fr. Membranaceous, adnate, circumference 

 fringed and whitish. Hymenium thin, dark olivaceous, tomen- 

 tose with small bristles. 



Broadly effused, orbicular or elongated. The colour is distinguishing and 

 remarkably constant. 



On pine wood. Uncommon. 



Spores sphaeroid or spheroid-ellipsoid, very pale yellowish or slightly fus- 

 cous, 4 mk. K. ; ovoideo-ellipsoid, nucleate, yellow, 8 mk. Q. Name from 

 the colour. Fr. Hym. Eur. p. 660. Theleph. Fr. Elench. p. 197. Berk. 

 Out. p. 269. C. Hbk. n. 908. 



46. C. ferrugineum Fr. Ferruginous, effused, adnate, every- 

 where tomentose. Hymenium papillose, pulveraceous. 



It may be compared with Hydnumferruginosum and Polyporus fioccosus. 



