CORTICIUM. 283 



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

 Nov. 



Name — aridus, dry. Fr. Hym. Eur. p. 659. S. Mycol. Scot. n. 905. 

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



Subgenus II. — Hypochnus. Breaking up and becoming 



floccose, &c. 



* Breaki?ig up and becoming floccose. 



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

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

 open intoflocci, 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, 

 9-1 1 X7-8 mk. K. Name — serus, 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. M.J.B. 

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

 Hbk. n. 943. S. Mycol. Scot. n. 907. — Grev. t. 242. Letell. t. 6o~j.f. 2. 



** Hymenium tome7itose, 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 sphaeroid-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 Hydnum ferruginosum and Polyporus jloccosus. 



