19261 



BURT — THELEPHORACEAE OF NORTH AMERICA. XV 215 



29. C. subgiganteum Berkeley, Grevillea 2: 3. 1873; Sacc. 

 Syll. Fung. 6: 632. 1888; Lyman, Boston Soc. Nat. Hist. Proc. 

 33: 151. pi 18 J. 2-21, pl- 26, f. 137. 1907. 



Peniophora subgigantea (Berk.) Massee, Linn. Soc. Bot. Jour. 

 25: 142. 1889. — Michenera artocreas Berk. & Curtis, Linn. Soc. 

 Bot. Jour. 10: 333. 1868; Sacc. Syll. Fung. 6: 653. 1888; 

 Patouillard, Soc. Myc. Fr. Bui. 7: 42. pL 4, f. 1-5. 1891; Essai 

 Taxon. 67. 1900; Peirce, Torr. Bot. Club Bui. 17: 305. pi. 110, 

 f. k-n. 1890; Lyman, Boston Soc. Nat. Hist. Proc. 33: 157. 

 pi. 18, f. 6-21, pi. 26, f. 137. 1907.— An Cartidum gilvidum 

 Bresadola, Ann. Myc. 18: 46. 1920? 



Type: in Kew Herb, and Farlow Herb. 



Basidiosporic stage broadly effused, adnate, thick, membrana- 

 ceous, separable in small pieces when moist, drying light buff to 

 light ochraceous-buff, even, glabrous, not cracked, the margin 

 whitish, sometimes buff when old; in section 500-1000 jx thick, 

 not colored, with the hyphae densely interwoven, about 2-23^ [x 

 in diameter, not incrusted, not nodose-septate; no gloeocystidia ; 

 paraphyses with pointed tips; basidia large with 4 sterigmata 

 usually; basidiospores hyaline, even, globose or subglobose, 

 14-19 (X in diameter or 14-19 X 12-16 ;x. 



Chlamydosporic or Michenera fructifications disk-shaped, con- 

 cave, drying snuff-brown, cracked, the margin acute, thick, white 

 on its elevated side; in section 1-2 nam. thick, composed of a thick 

 basal layer of densely interwoven hyphae about 2 ;x in diameter 

 which terminate in sporiferous ends and branches densely crowded 

 together in the concave layer at surface of the fructifications; 

 sporophores consist of each a single chlamydospore terminating 

 in a slender, flexuous, tapering terminal appendage up to 10-50 [x 

 long; chlamydospores ovoid, even, 12-20 X 10-15 (x. 



Basidiosporic fructifications 2-15 cm. long, 1-4 cm. wide; 

 Michenera fructifications 6-8 mm. in diameter. 



On bark of dead limbs of Acer rubrum. Magnolia, and Lirio- 

 dendron. In swamps in the Atlantic states from Canada to 

 Cuba. July to February. Occasional. 



Fructifications -of the perfect stage bear some resemblance in 

 general aspect to those of C. portentosum but are readily dis- 

 tinguished by the much larger spores. When growing on the 



