18 C. H. OSTENFELD. M.-N. Kl. 
I fully agree with him in keeping the Scandinavian form apart from the 
alpine one, the true 4. alpina, but it has not been necessary to create 
a new name, as GELERT (l. c.) has shown, that RICHARDSON'S original 
specimens in British Museum and Kew belong to the same species as the 
Scandinavian ones, which also appears from several things in RICHARDSON’S 
original description (1. c.), e. g. »racemo fructifero laxo elongato«; conse- 
quently we must use RICHARDSON'S name also for the Scandinavian Braya, 
hitherto named B. alpina auctt. scand. or B. linearis Rouy. 
This species is characterized by its slender erect stems, its thin, 
remote-dentate, linear-lanceolate radical leaves, its linear stem-leaves, its 
long linear pods (5—6 times longer than the sepals), more slender growth 
and in fruit elongated inflorescence; it has been found at a few places 
in Arctic Norway and Sweden, in East Greenland (Scoresby Sound), in 
western Arctic America, and seems to be a rare species. Its synonymy 
is: B. glabella RicHarps., |. c.; Hooker, Fl. Bor. Am., I, 1830, p. 65; 
8. alpina auctt. scand., non STERNB. & Hoppe; B. linearis Rovy, |. c. 
Braya purpurascens (R. Br.) BUNGE on the other hand is not rare in 
Arctic countries. I know it from Spitsbergen, Novaya Zemlia, Waygats, 
Chabarowa, East and West Greenland, and »Arctic America«. Its distri- 
bution seems in America to be more eastern, while that of B. glabella 
is more western. 
Parrya R. Br. 
40. Parrya arctica R. Brown, Chloris Melvill., 1823, p. 11, tab. B; 
Hooker, Fl. Bor. Am., I, 1829, p. 47; Macoun, Catalogue, I, 1883, p. 49. 
In flower from the beginning of July (7th, 1904) until the beginning 
of August (4th, 1905); no pods developed, but remains of ripe pods from 
the year before present. 
This species seems to be rare; its area of distribution is restricted 
to Arctic America east of ca. 120° Long. W and west of Greenland and 
Ellesmere-Baffin Land. 
Rosaceae. 
Potentilla L. 
41. Potentilla Vahliana LEHMANN, Monogr. Potentill., 1820, p. 172; 
Hooker, Fl. Bor. Am., I, 1834, p. 194; TH. Worr, Monogr. Potentill., 
1908, p. 247; RYDBERG, North American Flora, vol. 22, 4, 1908, p. 333; 
P. nivea, var. Vahliana, Macoux, Catalogue I, 1883, p. 139. 
In bloom in July 1904 (7th—31st) and the beginning of Aug. 1905 
(2nd—5th). 
