SOME SCOTTISH RUST FUNGI 45 
pies ‘feltzt Johans.; both these ecidial stages occur on Tha- 
lictrum alpinum, but the confusion between the two is somewhat 
sarprising since each has a very different effect _— the 
host plan 
odoratum L. probably also served as a second host plant. 
Boel suggested the name Puccinia borealis for the fungus. 
ere is no doubt that Juel fully Same pa ase scraped of his 
Scandinavian specimens with Greville’s Scott 
n view of the omission of this fungus pm esis British 
works a translation of Juel’s description is given :—Spermogonia 
absent. Aicidia (47. Thalictri Grey.) few (about 8-12) together, 
seated on unthickened spots, h become pale dis 
pseudo-peridia at first cylindrical, later with torn revolute 
margins; spore mass —— ; spores with finely punctate wall 
about 131 in diameter. Ure — sori sig Se bey elongated, 
situated on pale spots; spores 15-18 » in diam., with moderately 
thin, rather finely verruculose eatin aiid with rouge: -coloured 
contents ; ren noe absent. Teleut ospores ; sor vi gL a bs 
® 
Ee, 
g 
hi 
a 
the: Royal Botanic Garden, dinkargh, A search has recently 
" Gre ville’s een and the existence of his type specimen 
elaarky: justify the inclusion of this species in the British Uredinales. 
PUccINIA SEPTENTRIONALIS Juel. 
The excidial stage of Puccinia septentrionalis on Thalictrum 
~ alpinum was described by Johanson from Iceland in 1885, who 
gave it the name of Acidium Sommerfeltii; he painted out that 
it was distinguished from 4%. Thalictrt Grev. by the production of 
its zcidia on swollen red or violet coloured spots on the stems and 
* Mykologische Beitriage v. Ofvers af K. Vet-Akad. Foérh, No. 8, 1898, 
p. 411, 
