[Vor. 4 
350 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Illustrations: Fries, Icones Hym. pl. 193. f. 1; Romell, 
loc. cit. 
Type: authentic specimen in Kew Herb. 
Fructification resupinate, effused, thin, drying brittle, sep- 
arable but not as large fructifications, coming off in small 
pieces, drying raw umber when fully mature, the margin thin- 
ning out and whitish; hymenium with thin, 
() slightly elevated, gyrose folds which outline 
Сә d more or less completely the shallow pores, the 
latter about 3-11 mm. in diameter and some- 
Fig. 31 times divided into smaller pores; in structure 
M. himantioides. about 100 џ thick, with (1) a narrow layer next 
bet oh 02, теў, to the substratum, of a few honey-yellow 
hyphae ranging up to 6-7 д in diameter, not 
inerusted, and with (2) a broader layer extending to the 
hymenium, of loosely interwoven, hyaline hyphae 4 y in diam- 
eter; spores honey-yellow under the microscope, even, 
9-106 и. 
Fructifications 2-5 em. in diameter. 
On fallen trunks of pine and other conifers, usually in 
mountain forests. Canada and New Hampshire to Washing- 
ton. June to November. 
Fries placed this species in the white-spored section of 
Merulius, and his illustration of this species was based upon 
a young specimen in which white and sordid yellow are more 
conspicuous than in fully mature specimens. Romell has 
kindly shared with me specimens which he collected in 
northern Sweden, which show both the young stage of Fries’ 
Ieones, pl. 193. f. 1, and the fully mature stage, and the de- 
termination of which he has further confirmed by comparison 
with the authentie specimen from Fries in Kew Herb. Ihave 
based my deseription upon the more mature of these speci- 
mens. M. himantioides differs from M. lacrymans in being 
much thinner, not compact nor fleshy, in having the thin, acute 
dissepiments but little raised, not grown out into teeth, and 
often mere gyrose folds which barely suggest location of 
pores, in having the hyphae less densely interwoven in sec- 
tions, and in having paler spores. 
