2 ARKIV FÖR BOTANIK. BAND 12. N:0 7. 



cies in the Herbarium Normale of E. Fries, (fasc. 8, n:o 24, 

 n:o 22 and n:o 23). 



Many years later, in revising the Arctic Cruciferce of 

 the Botanical Museum of Copenhagen 0. Gelert discovered 

 that the Norwegian D. incano-hirta Hartm. was identical 

 with the Greenlandic Draha arctica J. Wahl. (Flora Danica 

 1840 fasc. 39 tab. 2294), O. Gelert: Notes on Arctic Plants, 

 Botanisk Tidskrift, 21 bind., 3 h., Kjöbenhavn 1898, p. 307). 



Following Gelert Messrs Neuman and Ahlfvengren 

 adopted this name in their Sveriges Flora 1901 p. 474, 

 with Draha incano-hirta (p. p.) as a synonym.; and Draha 

 rupestris was given as an independant species with the 

 diagnosis in closer correspondence to that of R. Brown in 

 Hortus Kewensis ed. 2 t. IV (1812) p. 91. 



1. Draba magellanica Lam. 



The characteristics by which Draba arctica is distin- 

 guished from Northern Leiicodrabce, especially D. rupestris 

 are as follows: The growth is taller than that of D. ru- 

 jyestris, the leaves of the sterile rosella of the first year ex- 

 clusively entire, the stem of higher individuals has 2 — 6 

 leaves, the pedicels are often patulate, the flowers large — 

 the petals 4 — 6 mm. — the sepals light-coloured and hairy 

 and, last but not least, the covering of the rosulate leaves con- 

 sists almost only of stellulate hairs more or less branched. Ac- 

 cording to the diagnosis of J. Wahl, only specimens with a 

 very dense pubescence have been designated D. arctica, 

 whereas more glabrous ones but with the same sort of co- 

 vering and other characters have been referred to D. incano- 

 hirta or to the comprehensive term of »Draba hirta». It is 

 probably on account of this fact that some botanical authors 

 have formed the opinion that there is no strict line of de- 

 marcation between D. arctica and t>D. hirta». Accordingly 

 they have classed D. arctica only as a subspecies to »D. 

 hirta». (Watson in Gray, Synoptical Flora of North America 

 vol. 1 part. 1 p. Ill (1887), Lindberg Fil. according to Hjelt 

 Conspectus Florae Fennicse in Acta pro Fauna et Flora b. 30 

 p. 337 and Simmons in Flora of EUesmereland (1906) p. 94. 



