1920] 



BURT THELEPHORACEAE OF NORTH AMERICA. XII 141 



California: /. M. Johnston, comm. by C. G. Lloyd, part of type 



of Stereum occidentale (in Mo. Bot. Gard. Herb., 56762); 



Alameda Co., L. S. Smith, Univ. Calif. Herb., 403 (in Mo. 



Bot. Gard. Herb., 44150); Preston's Ravine, Palo Alto, W. 



A. Murrill & L. S. Abrams, 1190, comm. by N. Y. Bot. 



Gard. Herb, (in Mo. Bot. Gard. Herb., 55711); Redwood 



Park, W. H. Long, 12604 (in Mo. Bot. Gard. Herb., 55100) ; 



Santa Barbara, 0. M. Oleson, 7, 15. 

 Arizona: C. G. Pringle, comm. by W. G. Farlow. 

 Mexico: San Luis Potosi, comm. by U. S. Dept. Agr. Herb. 



39. S. australe Lloyd, Myc. Writ. 4. Letter 48: 10. 1913; 

 and ibid. Letter 60: 15. 1916. Plate 4, fig. 37. 



An Thelephora mytilina Fries, Elenchus Fung. 1 : 175. 1828? 



Type: in Lloyd Herb, and Mo. Bot. Gard. Herb. 



Fructification coriaceous, attached by the resupinate side and 

 umbo, broadly reflexed, sometimes laterally confluent, densely 

 tomentose, becoming concentrically furrowed and very rarely 

 glabrous and showing the shining chestnut surface of the pileus 

 in one or more of the furrows, the margin entire, sometimes 

 becoming blackish; hymenium even, glabrous, drab-gray to avel- 

 laneous, becoming red-discolored where cut or bruised, and 

 sometimes bleeding; in structure 900 ju thick, composed of dense- 

 ly, longitudinally arranged hyphae, among which are a few col- 

 ored conducting organs 3 4J n in diameter which curve into the 

 hymenium between the basidia; no cystidia nor gloeocystidia 

 present ; spores hyaline, even, flattened on one side, 4-4| X 2 J-3 n, 

 few found. 



Fructifications with resupinate portion 1-3 cm. broad, reflexed 

 portion 1-4 cm. broad, 1-5 cm. long and sometimes more by 

 lateral confluence. 



On hardwood logs. Florida and Mississippi to Brazil. Au- 

 gust to December in the north and in July in Brazil. Appar- 

 ently rare. 



Stereum australe combines the characters of S. fasciatum and 

 S. gausapatum. Its general aspect resembles that of specimens 

 of S. fasciatum in a middle period of development when they are 

 effuso-reflexed and have the umbo developed, but the specimens 

 of S. australe have a broader resupinate portion than those of S. 



