46 THE JOURNAL OF BOTANY 
leaves of the host plant. Juel* in 1895, working with a 
ag in Norway and Sweden, showed that the spores 
4h. merfeltit were capable of infecting rs Semi ae 
and P. Y Bistoria, and that uredospores and teleutospores were 
prcinied on these hosts. He accordingly gave a name Puccinia 
septentrionalis to the fungus. 
Aicidium Sommerfeltvi has been found in raeatai it was 
collected in abundance on Ben Lui in June, 1913, and on Meall 
nan Ptarmachan in 1914, in each locality at eee 2500 ft. Iam 
informed by Messrs. J. R. Drummond and R. C. Davie that it is 
of common occurrence on many of the higher mountains in 
Scotland. An unnamed specimen of the fungus collected in 1845 
in Glen Callater, T Avayleahatine is preserved in the Herbarium of 
the Royal Botanic Garden, Edinburgh. It may, therefore, be 
concluded that this ‘ce is widely distributed in Scotlan 
In October, 1914, a search was made for the remaining stages 
and teleutospores were found in abundance on Polygonum vivi- 
parum on Ben Lui. Uredospores were not discovered, but this 
hic 
and it appears probable that coe species does not serve as a 
for the fungus in these localitie 
The following is a Saimin of Juel’s description of the 
fungus :— 
Spermogonia absent. Aicidia amphigenous, on swollen rather 
extensive dark violet coloured spots, numerous; pseudoperidia 
widely expanded, revolute. Uredospores hypophyllous, Sire Abe 
pale spots on the upper surface of the leaf, naked, soon bec 
ba ; spores with echinulate sea wall, outeales bri wht 
orange, about 20 » in diameter, germ-pores 3-4. Teleutospores at 
first developed amongst the uredospores, but later in special dark 
rown sori, usually hypophyllous, occasionally pate spores 
rather variable, elliptic ovate or pear-shaped, 28-48 » x 13 x 23 yp; 
upper cell thickened at apex with a hyaline path: of acai 
size, baw cell with a lateral germ-pore; wall smooth, chestnut- 
rown ; contents colourless ; pedicels deciduous 
Hicidia on the leaves and all green parts of Thalieivam alpinum 
in the arctic regions of Greenland and Norway, and in the 
mountains of Sweden — Switzerland. Uredospores and sels 
spores on the leaves of Polygonum viviparum up to onl 
now only 
from ee deauAinaniat mountains; also on P. Bistorta by artificial 
infec 
Tae oles British species of a produce their teleuto- 
spores pares the species of Polygonum already mentioned. P. 
ne Mykologische Beitrige iv. Ofvers af K. Vet-Akad. Férh. No. 6, 1895, 
p. . 
* 
