L. ROMELL, HYMENOMYCETES OF LAPPLAND. 11 
P. albolutescens n. sp. 
Resupinatus, mollis, albo-croceo-lutescens, separabilis, 1— 
2 mm. crassus, dorso luteo, margine byssino, fimbriato albo vel 
lutescente. Pori albo-lutescentes, 3—4 vel 2—4 per mm., de- 
mum insquales. Hyphae molles, fibulatae, 2—3—4 y. latae. 
Basidia 4-spora, clavata, 15—205x4!/,—6 pv.  Sterigmata 
3—8 p. longa. Sporae globoso-ellipsoideae vel globoso-ovatae 
3—5 x 21/,—A y. 
On rotten wood of Abies at Lakatrask. 
A specimen collected at Rydbo near Stockholm differs in 
having the margin almost arachnoid, more white and not fim- 
briate, the back-side more white, the hyphae collapsed, irregular 
and broader (3—6 v, some cells even inflate up to 9 v), the 
basidia sometimes cylindric (12X6—7 y) with a clavate or 
obovate basis (1512 v.) and the spores globose, 5—7 yp. diam. 
— This might belong to a distinct species, but is probably clo- 
sely allied. 
The authentic specimen of T'rechispora onusta KARST. seems 
to contain two species, viz. Pol. hymenocystis B. & Br. and the 
species above described. As KARSTEN refers his plant to a 
separate genus with echinulate spores, which occur in P. hy- 
menocystis only, I think it unadvisable to apply his name »onus- 
tus» to the present species. 
The specimen from Rydbo might belong to Poria onusta 
Bres. Fungi Gall. p. 41, though the basidia are there described 
as »subglobose» which they are not in my specimen, at least 
not in the ripe state. I have seen some subglobose top-cells 
(about 9 w broad) in the specimen from Rydbo, but whether 
they are cystidia or the basis on which a cylindric basidium is 
formed later, I have not had time to ascertain. In the specimen 
from Lakaträsk I do not find such top-cells. Both specimens 
have typical subulate sterigmata. 
P. benzoinus. 
On a stub of Pinus silvestris at Kalixfors and on Abies at 
Nattavara. 
Spores hyaline, allantoid or runner-shaped 5—9 x2—3 
v. (in specimens from Stockholm). 
P. betulinus. 
On dead trunks of Betula at Stordalen. 
