42 C. H.OSTENFKI.II. 



Greenlantl. H»'p. Str. Nurwr^. Anlic Expeditioii iii llu- "Fraiii" 1.S98 — 1902, 



No. U>, Kristiaiiia l}t()9. (Contaiiis a fiill list of Iho earlier literalure). 

 SiMMONs, H. Cl. (1913): A Survi-y <'f tli.- Pliytogeof?raphy of the Arclic American 



Artlii|>('lap>, wilh soiuf notes on its expJDralioii. — Lutids universitets årskrift, 



N. F. Afd. 2. Hd. 9. \r. 14. Lund and Lfip/JK, 1!I13. 

 Steffen, H. (1924): Versuch /ur Gliederung der arktischen Flora. — Botani- 



sches Archiv, vol. \ i. 

 — (1925): Woitere lieitriige zur Gliederung der arktischen Flora. — Ibidem, 



vol. X. 



