[Vol. 5 

 342 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



geneous layer of loosely interwoven, suberect hyphae, with 

 setae distributed in outer half of the layer, rather large 

 spores, and the occurrence in the United States upon bark 

 of Ostrya and Vaccinium arboreum. Von Hohnel and Lit- 

 schauer in their notes on types in Karsten's herbarium^ re- 

 ferred Hymenochaete arida and H. laxa to H. unicolor and 

 H, cinnamomea respectively species with which they have 

 nothing in common except color. 



Specimens examined: 

 Exsiccati: Eavenel, Fungi Car. 5:25; Fungi Am., 10; de 

 Thiimen, Myc. Univ., 512. in each under the name Corti- 

 cium simulans B. & Eav. 

 Finland: Mustiala, P. A, Karsten, authentic specimen and an- 

 other specimen communicated by Bresadola ; Runsala, P. A, 

 Karsten, authentic specimen of Hymenochaetella laxa. 

 Sweden: Upsala, C. G. Lloyd, 08425 (in Lloyd Herb., and in 



Mo. Bot. Gard. Herb., 55472). 

 Vermont: Middlebury, E. A, Burt, 

 New York: Fort Ann, 8, H, Burnham, 41 (in Mo. Bot. Gard. 



Herb., 54456). 

 South Carolina: Aiken, H. W. Ravenel, in Ravenel, Fungi 

 Car. 5 : 25, Fungi Am., 10, and in de Thiimen, Myc. Univ., 

 512. 

 Michigan: Ann Arbor, C. H. Kaufman, 32, 



19. H. unicolor Berk. & Curtis, Linn. Soc. Bot. Jour. 10 : 

 335. 1868; Cooke, Grevillea 8 : 148. 1880; Sacc. Syll. Fung. 

 6:597. 1888; Massee, Linn. Soc. Bot. Jour. 27:108. 1890; 

 Lloyd, Myc. Notes 41 : 572. text f, 780, 781, 1916. 



H. fuliginosa Berk. & Curtis, Linn. Soc. Bot. Jour. 10 : 335. 

 1868; not H. fuliginosa (Pers.) Lev. 



Type: in Kew Herb. 



Fructification resupinate, long and broadly effused, adnate, 

 dense, cracked, brittle, scaling off from the wood, drying 

 antique brown; in structure 500-700 /* thick, composed of a 

 very thick, somewhat zonate, setigerous layer and of a thin 

 hyphal layer which is often not sharply distinguishable from 

 the setigerous layer ; hyphae 2^-3 /i in diameter ; setae scat- 



^K. Akad. Wiss. Wien Sitzungsber. 115 : 1577, 1578. 1906. 



