L. ROMELL, HYMENOMYCETES OF LAPPLAND. 20 
margin grayish. Pores 4—6 per mm. Spores allantoid, 3 '/,— 
5x 1—1'/,u.. Hyphae as in P. lacteus intricate, 3—6(—9) v». broad. 
P. vaporarius FR. 
On charred trunks of Pinus silvestris at Nattavara. 
Pores 2—3(—4) per mm. Spores allant., 6x1Y/,—2 u, (in 
spec. from Femsjö). 
The specimen collected was too dry and old to get spores 
from. In the allied Pol. sinuosus the spores are allantoid (though 
not strongly curved) 5—7(—9)x1—2 u. FRIES” Ic. t. 190 
fig. 1 is not like either of those but might be the resupinate form 
of Lenzites heteromorpha, — Pol. vaporarius as understood in 
England is another species, viz. Pol. versiporus PERS. 
P. velutinus. 
On trunks of Betula at Tornetrask, Bergfors and Kalixtors. 
Pores 3—5 per mm. Spores subcylindric, 6—8 x2 y. 
P. vulgaris. — Fig. 12. 
On rotten wood of Salix and Betula at Jebrenjokk and 
Abisko and on wood of Pinus silvestris at Kalixfors. 
The pores are more or less sulphurous at least within. Po- 
res about 4—5 per mm. with rather thick partitions. The hy- 
menial hyphae firm, undulate, not fibulate, 2—4 w broad. 
Spores allantoid, 4—6 x1 /,—1!/, w. 
As I had hitherto collected this sulphurous variety but on 
pine, I was surprised now to find it growing also on deciduous 
trees. 
This is probably the variety calcea FR. as understood in 
Epicr. and Hym. Eur., but in Syst. Myc. the name is restricted 
to the form with »poris hiantibus ». 
P. flavus K. and P. selectus K. are probably synonyms, 
but P. flavicans K. is a more soft and fragile species, with tender 
fibulate hyphae and generally irregular, lacerated pores. 
P. zonatus. 
On trunks of Betula at Njutum, Abisko, Stordalen, Torne- 
träsk, Bergfors and Kalixfors, at Abisko also on Populus. 
Pores about 3 or 3—4 per mm. Spores cylindrically oblong 
oblique, apiculate, 6—9 x3 u. 
If I am not mistaken, the authentic specimen of Pol. me- 
dulla panis FRIES in the Upsala herbarium is only the resupi- 
