1917] 
BURT—MERULIUS IN NORTH AMERICA 311 
and dimidiate form. In determining dried specimens in the 
herbarium, the distinguishing positive characters are the 
dimidiate form, imbricate habit, immediate softening through- 
out of a piece of the fructification when water is applied to 
it preparatory to sectioning—due to absence of such a ge- 
latinous subhymenial layer as occurs in M. tremellosus—, and 
spores slightly larger than those of the latter species and not 
strongly curved. Fries noted in ‘Epicrisis’ that M. incar- 
natus is unique in the Leptospori in not being effuso-reflexed. 
M. incarnatus is probably rare outside the Mississippi Valley 
and is not known to occur in the collections of Curtis and 
Ravenel, who mistook reddish and broadly reflexed specimens 
of M. tremellosus for M. incarnatus. 
Specimens examined: 
Exsiecati: Ell. 6 Ev., N. Am. Fungi, 3004. 
North Carolina: Schweinitz, type (in Herb. Schweinitz). 
Alabama: Montgomery, R. P. Burke, 136 (in Mo. Bot. Gard. 
Herb., 10464). 
Louisiana: St. Martinville, А. В. Langlois, 2810, 2245 (the 
latter in Mo. Bot. Gard. Herb.). 
West Virginia: L. W. Nuttall, in Ell. & Ev., N. Am. Fungi, 
3004. 
Tennessee: Elkmont, C. H. Kauffman, 84 (in Mo. Bot. Gard. 
Herb., 18643). 
Ohio: Cincinnati, А. P. Morgan, type of Merulius rubellus (in 
Coll. N. Y. State). 
Indiana: Greencastle, L. M. Underwood, 12 (in Mo. Bot. Gard. 
Herb., 4083), and an unnumbered specimen (in N. Y. Bot. 
Gard. Herb.). 
Missouri: Gaylor, S. M. Zeller (in Mo. Bot. Gard. Herb., 
9080) ; Loughboro, L. О. Overholts (in Mo. Bot. Gard. Herb., 
4082); Meramec Highlands, S. M. Zeller (in Mo. Bot. Gard. 
Herb., 43749). 
Arkansas: Bigflat, W. Н. Long, 19900 (in Mo. Bot. Gard. 
Herb., 9140) ; Cass, W. H. Long, 19829 (in Mo. Bot. Gard. 
Herb., 9137). 
Mississippi: Starkville, 9. M. Tracy (in N. Y. Bot. Gard. 
Herb.) 
