L. ROMELL, HYMENOMYCETES OF LAPPLAND. 21 
Resupinatus, adnatus, 1—2 mm. crassus, margine byssino 
vel nudo, albus, pallescens, dein subfulvescens, in statu sicco 
rigido-fragilis, demum quasi glutinescens et tum in statu sicco 
rimosus et quoad colorem et consistentiam quasi sordide resi- 
naceus. 
Pori inaequales, angulati, 3 vel 2—4 per mm., vulgo obliqui. 
Hyphae fibulato-septatae, tenues, 2 vel 2—3 v latae. Basidia 
15—20 x4—5 yv. Sporae oblique oblongae, 4—5(—7) x 2—2 '/, 
(—3) v. 
This species, which is collected also at Stockholm (on dead 
trunks of Salix in a hedge), I first supposed to be the true 
Polyp. aneirinus Somm. Authentic specimens show, however, 
that the latter is identical with Pol. serenus K. (both having 
broader spores, 5—6 x3—4 uw.) and consequently distinct both 
from my plant and from FRIES” Pol. aneirinus, which is identical 
with Pol. corticola according to specimens in FRIES” herbarium. 
Though the hyphae of many fungi, especially when old 
and exposed to continual moisture, are liable to be reduced into 
a more or less conglutinate state so as to render the plant or a 
part of it like resin or horn when dried, I think that the present 
species shows this character in a more conspicuous manner, so 
that the name may be considered reasonable. At all events, 
I was not able to invent any better (the occurrence on Salix at 
Stockholm forbidding the use of a name indicating the host or 
the northern habitat). 
P. reticulatus. — Fig. 10. 
On rotten trunks of Betula, Salix and Sorbus at Bjorkliden, 
Nuolja, Palnoviken and Kalixfors. 
Pores 2—4 per mm. Spores allantoid, 7—9x2—3 wy. 
Hyphae fragile, not fibulate, 4—5 u. broad. — The young pores 
are distant, forming shallow cups in the cobwebby subiculum 
so that the plant in this state might be referred to Porothelium; 
soon, however, the cups expand and grow together so as to form 
a continuous hymenium. 
The color is generally white, but changes sometimes into 
yellowish as in P. expallescens var. flavidulus K., which in my 
opinion is a synonym, it having the same macro- and micro- 
scopic characters. Also the authentic specimen of P. farinellus 
in the Kew herbarium belongs here. 
