1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 187 



9. C. portentosum Berk. & Curtis, Grevillea 2: 3. 1873; 

 Morgan, Cincinnati Soc. Nat. Hist. Jour. 10: 201. 1888; Sacc. 

 Syll. Fung. 6: 636. 1888; Massee, Linn. Soc. Bot. Jour. 27: 129.. 

 1890; Bourdot & Galzin, Soc. Myc. Fr. Bui. 27: 235. 1911. 



Corticium diminuens Berk. & Curtis, Grevillea 2: 3. 1873; 

 Sacc. Syll. Fung. 6: 631. 1888; Massee, Linn. Soc. Bot. Jour. 

 27: 158. 1890. Stereum portentosum (Berk. & Curtis) v. Hohnel 

 & Litschauer, K. Akad. Wiss. Wien Sitzungsber. 116: 743. 1907. 

 Corticium portentosum crystallophorum Ell. & Ev. Torr. Bot. 

 Club Bui. 24: 125. 1897. Corticium Aluta Bresadola in v. 

 Hohnel & Litschauer, Wiesner Festschr. Wien, 62. 1908. An 

 Corticium grammicum P. Hennings, Engl. Bot. Jahrb. 38: 106. 

 1905? Compare v. Hohnel & Litschauer, K. Akad. Wiss. Wien 

 Sitzungsber. 116: 743. 1907. 



Type: in Kew Herb, and Curtis Herb. 



Fructifications long and widely effused, thick, coriaceous-soft, 

 small pieces separable when moistened, white, becoming light 

 buff to warm buff in the herbarium, even, only rarely cracked, 

 the margin often whitish, pubescent- villose; in section 150- 

 1000 [k thick, colored like the hymenium, becoming zonate or 

 stratose when thick, composed of very densely interwoven, tough 

 hyphae about 1-2 \l in diameter, not incrusted, not nodose- 

 septate, protruding in the hymenial surface as curved paraphyses; 

 more or less numerous aggregations of mineral matter may be 

 immersed in the substance; no gloeocystidia; basidia few; spores 

 hyaline, even, spherical, 4^-7 \l in diameter, few present usually. 



Fructifications 4-12 cm. long, 2-4 cm. wide. 



On bark and wood of logs of frondose species. In Europe, 

 South Africa, throughout North America and the West Indies, 

 in South America, and in the Philippine Islands. Common. 



C. portentosum is well named and may be recognized by its 

 large, whitish, coriaceous fructifications on frondose logs, which 

 become zonate within in thick specimens, and have globose spores 

 6 [i in diameter, and the slender branches of the interwoven 

 hyphae exceeding the basidia and forming the hymenial surface. 

 This species was formerly confused in Europe with Stereum 

 alneum and was communicated to me under this name by both 

 Karsten and Bresadola. It also occurs from Lindblad in Kew 



