1917] 
BURT—MERULIUS IN NORTH AMERICA 327 
Finl. Basidsv. 342. 1889; Murrill, N. Am. Fl. 9: 163. 1910.— 
An Merulius rimosus Berk. in Cooke, Grevillea 19 : 108. 1891? 
Fructification effused, reflexed, thin, membranaceous, soft, 
drying whitish to pinkish buff; hymenium contracting in dry- 
ing and becoming fissured, drying cream-color 
to ochraceous tawny, with the folds narrow, Ù 2 
rugaeform, interrupted, somewhat gyrose but Fig. 10 
not forming pores; in structure 1-13 mm. thick, TIPO 
eomposed of loosely interwoven, rather rigid, E oe 2 29 
hyaline hyphae 3-4 y in diameter, which bear a Es pb 
very dense hymenium; no cystidia; spores hyaline, even, 
slightly curved, 444-1 и, borne four to а basidium. 
Fructification 1-24 em. in diameter, sometimes laterally 
confluent, with the reflexed margin 1-10 mm. broad. 
On bark of dead alders. Newfoundland to New York and 
in Michigan and British Columbia. March to December. 
This species is characterized by its flabby structure, pale 
color, very slender spores, and occurrence on alder. It has 
been regarded by some mycologists as сосепегіс with T'rogia 
crispa, but the folds are less lamellaeform than those of 
Merulius aureus. I have not been able to study the type in 
Kew Herbarium of Merulius rimosus, collected in northern 
New York by Ellis, and the cotype cannot be found in New 
York Botanical Garden Herbarium, but the description of the 
species applies well to М. niveus. 
Specimens examined: 
Exsiecati: Ell 6 Ev., N. Am. Fungi, 2017; de Thiimen, Myc. 
Univ., 804, 907. 
Finland: Mustiala, P. А. Karsten, in de Thümen, Myc. Univ., 
907. 
Newfoundland: A. С. Waghorne, 4 (in Mo. Bot. Gard. Herb., 
3742). 
Canada: Billings Bridge, J. Macoun, 210 (in N. Y. Bot. Gard. 
Herb.). 
Ontario: Toronto, Lorne Park, J. H. Faull, Univ. Toronto 
Herb., 360 (in Mo. Bot. Gard. Herb., 44844). 
Maine: Orono, Е. L. Harvey, in Ell. & Ev., N. Am. Fungi, 
2017; Harrison, J. Blake, comm. by P. L. Ricker. 
