1917] 
BURT—MERULIUS IN NORTH AMERICA 359 
in abundance and with the hymenium continuous and as well 
developed on the edges of the folds as elsewhere. This species 
is related to М. Pinastri, but the latter is not dry in structure 
and has larger pores and the folds often grown out into 
hydnoid teeth. 
Specimens examined: 
Porto Rico: Rio Piedras, J. R. Johnston, comm. by J. A. 
Stevenson, 4664, type (in Mo. Bot. Gard. Herb., 56589). 
40. М. atrovirens Burt, n. sp. 
Туре: in N. Y. Bot. Gard. Herb. 
Fructification resupinate, effused, membranaceous, sepa- 
rable, drying between dark ivy-green and dark olive-gray in 
the central region, bordered by obscure wood-brown, the mar- 
gin whitish and thinning out; hymenium at 
first reticulate-plicate, at length porose with О СУ 
angular pores about 1-13 mm. deep and about O eS 
12-2 to a mm.; in structure 400-600 y thick, Fig. 38 
with (1) the layer next to the substratum com- М. atrovirens. 
posed of loosely interwoven, somewhat colored age f p^ 
hyphae 3 шіп diameter, occasionally nodose- 
septate, incrusted, and with (2) a broader layer extending 
to the hymenium, with hyphae densely interwoven and hya- 
line; no cystidia; spores citron-yellow under the microscope, 
even, 44-53-33 y. 
Fructification 3-8 cm. long, 2-4 em. broad. 
Under side of decaying log of Liriodendron tulipifera. 
Along Caney River, on lower slope of Mt. Mitchell, Yancey 
County, North Carolina. September. 
This species is related to M. himantioides, but is distinct by 
its dark green color, small spores, and thicker fructification. 
Specimens examined: 
North Carolina: Mt. Mitchell, Yancey County, 6. Ғ. Atkinson, 
Cornell Univ. Herb., 11934, type (in N. Y. Bot. Gard. 
Herb.). 
EXCLUDED SPECIES 
M. patellaeformis Berk. & Curtis, Grevillea 1: 70. 
1872. 
