1917] 
BURT—MERULIUS IN NORTH AMERICA 329 
14, М. sororius Burt, п. sp. 
Type: in Burt Herb. 
Fructification resupinate, effused, membranaceous, thin, 
separable, the margin white, narrow, byssoid, often barely 
free but not reflexed; hymenium drying car- 
tridge-buff, waxy, shining, gyrose-plicate with =. > 
slightly elevated, scattered folds, not forming Fig. 12 
pores; in structure 100-200 y thick, with the oo Ч 
folds standing out 200-400 и; hyphae һу НЕЙ 
Y 
eurving rather than straight, only rare 
nodose-septate, not inerusted, 21-3 шіп diameter towards the 
hymenium, 44-5 џ near the substratum; no cystidia; spores 
hyaline, even, flattened on one side, 3-42 y. 
Fructifications small, orbieular, 3-5 mm. in diameter, be- 
coming laterally confluent into masses up to 3 em. long, 5-7 
mm. broad. 
On decayed, decorticated pine wood. Maryland. Novem- 
ber. Rare. 
This species is related to M. fugax in gyrose-plicate 
hymenium, cottony margin, and being separable from sub- 
stratum, but it is paler and thinner than M. fugax, with 
smaller, slenderer spores, with hyphae not incrusted and only 
rarely nodose-septate. Furthermore, the fructifications form 
by confluence of many small fructifications and do not cover 
large areas in sheet-like masses. 
Specimens examined: 
Maryland: Takoma Park, C. L. Shear, 1135, type. 
15. M. lichenicola Burt, n. sp 
Type: in Mo. Bot. Gard. Herb. and N. Y. State Herb. 
Fructification resupinate, effused, composed of cobwebby 
filaments, which form a perforate, thin, tender, whitish mem- 
brane loosely borne on the substratum, the 
margin eobwebby ; hymenium forming slightly СЕ 
elevated, reticulate, colonial buff folds, then ы 
imperfectly porose, with the pores shallow, Fig. 13 
a M. lichenicola. 
angular, about 4 to a mm.; in structure 45 д Spores 21670 
thick, with folds standing up 90-120 и further, вее рі. 21, f. 12. 
