[Vol. S 

 320 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Grenada : Grand Etang, R, Thaxter, comm. by W. G. Farlow. 

 Venezuela: Fendler, 175, type of Hymenochaete fulvella (in 



Kew Herb.), and 173 (in Curtis Herb., under the name 



Stereum fulvellum) , 



9. H. Curtisii (Berk.) Morgan, Cincinnati Soc. Nat. Hist. 

 Jour. 10 : 197. 1888. 



Stereum Curtisii Berkeley, Grevillea 1 : 164. 1873 ; Sacc. 

 Syll. Fung. 6 : 581. 1888; Massee, Linn. Soc. Bot. Jour. 27 : 

 195. 1890. 



Type : type distribution in Eavenel, Fungi Car. 3 : 26. 



Fructifications at first orbicular, then effused, confluent, be- 

 coming reflexed, coriaceous, thin, separable, drying pliant, the 

 upper surface at first silky, fibrillose, somewhat concentrically 



ridged, antique brown, becoming 

 glabrous and hair-brown when old; 

 hymenium not cracking, velvety, 

 antique brown; in structure 140- 

 240 /i thick, with intermediate layer 

 Fig- 7 bordered by a narrow, dense, dark 



CI X. ^' fo^^*^^"' X zone towards the upper surface of 



Section X 68. From type. ^^ ._ .1 i ^ . .i 



See pi. 17, f. 9. the pileus or the substratum, the 



hyphae densely and longitudinally 

 arranged, colored, thin- walled, 2 J fi in diameter; setae few 

 and far apart usually, 60-70x6-8 /*, emerging up to 45 /i, 

 tapering upward to a sharp point ; spores hyaline, allantoid, 



6-7Xli-2M. 



Fructifications confluent along under side of limbs for 2-20 

 cm. or more, 1^-2^ cm. broad ; reflexed lobes 5 mm. long, 10-15 

 mm. broad. 



On rotting limbs of Quercus and other frondose species. 

 Massachusetts to Texas and westward to Oregon in low alti- 

 tudes. April to December. Common. 



H, Curtisii may be recognized by its rich antique brown 

 color, thin, pliant, reflexed portions, velvety hymenium which 

 is not at all cracked, and by the notable scarcity of setae which 

 cannot be found in the hymenium with a pocket lens and are 

 sometimes lacking in thin sections in microscopic prepara- 



