26 ARKIV FOR BOTANIK. BAND Il. w:o 3. 
nate form of this or some allied species. PERSooN’s P. medulla 
panis is, however, another plant which I have collected but on 
rotten trunks of oak. 
Trametes. 
Three species were found: abietis, protracta and serialis. 
Tr. abietis KARST. 
On Abies at Nattavara. 
Pores 2—4 per mm. Spores hyaline, ellipsoidal-globose, 
TO ao Di. 
I have met with this species several times also at Stockholm. 
VLEUGEL has collected it at Umea. It is not mentioned in 
Fries’ works, unless P. chrysoloma is the resupinate form of it, 
which seems probable, though it can scarcely be demonstrated 
now, as authentic specimens are not saved so far as I know. 
Tr. protracta FR. — Fig. 21 (spores). 
On Pinus silv. at Kalixfors and Nattavara. 
Pores 2—3 vel 1—3 per mm. Spores linear-oblong with 
oblique point at the base, 9—125«3—4 y. 
Tr. serialis FR. — Fig. 25 (spores). 
On trunks of Abies at Nattavara. 
Pores 3—4 per mm. Spores oblong with oblique basal 
point, 7—9 X3 yp. 
I have seen this species labelled as »Pol. medulla panis », 
but it is quite distinct from PERsooN's species with that name 
at least. 
Dadalea. 
D. unicolor. 
On dead trunks of Betula throughhout the whole birch 
region. 
Spores oblong, oblique, about 6x3 y. 
Merulius. 
Of this genus I will note here seven species: borealis, fusi- 
sporus, himantioides, lepidus, molluscus, serpens, tremellosus. 
