24 ARKIV FÖR BOTANIK. BAND ll. w:o 3. 
tinct as it is much thicker and has pores more than twice as 
large and consequently a different habit, and as no intermediate 
connecting forms exist as far as I know.! Of Tram. mollis, 
which is a rather common plant at Stockholm, I did not find 
a single specimen in Lappland. The statement in Hym. Eur. 
p. 585 that T'ram. mollis is »in zona arctica vulgaris» might per- 
haps be owing to some confusion with Pol. stereoides. 
Pol. stereoides being a very rare plant in other parts of 
Sweden (I never saw it but in Lappland) Fries probably found 
it but once. It is thus no wonder that he later forgot the habit 
and characters of it and confounded it with specimens of the 
allied Trametes mollis. That his idea of Pol. stereoides was 
not clear in his later age appears also from the fact that he did 
not recognize the specimen of this plant sent from BLYTT and 
mentioned in Hym. Eur. under P. macraulos. 
As synonyms, may be added: Pol. Epilobii Karst. Pol. 
planus PECK and Tram. stereoides var. Kmetii BRES. 
P. tenuis KARST. 
On fallen trunks of Pinus silvestris at Kalixfors. 
Pores 2—5 per mm. Spores hyaline, linear-oblong or 
allantoid but only slightly curved, 7—9x1'/, v, 2-guttate. 
Spines brown, subulate, 40—60 x6 v. Hyphae 2—3 u broad. 
That this plant belongs to Fomes tenuis K. (Poria contigua 
Karsr.), which is common at Stockholm on rotten wood of 
Abies, is out of doubt. But whether Fomes tenwis K. is a syno- 
nym of Boletus contiguus PERS. is a question still unsettled to me. 
PERSOON’s plant is certainly closely allied (the hymenial spines 
measuring 30—60—130 x6—12 wv) but the spores are unknown 
and not a single specimen in my rich collections agrees exactly 
with PERSOON'S specimens with regard to the villosity on the 
surface of pileus. — Pol. contiguus of FRIES is quite different. 
according to the authentic specimens in his herbarium two of 
which belong to Pol. salicinus, while the third is identical with 
Pol. punctatus (Poria Friesiana BRES.). 
P. tephroleucus. — Fig. 4. 
On rotten trunk of Betula at Björkliden. Pileus, in the 
specimens collected, white or whitish and only towards the 
' Missledd af detta sistnämnda exemplar, som jag en tid trodde böra 
anses äga prioritet framför det andra, har jag i Krok och ALMQUISTS Flora 
låtit Pol. cervinus bära det äldre namnet Pol. stereoides. 
