i he greater part of the material upon which the following 

 description has been based was brought home by different collectors 

 from West and East Greenland, but some of it came from Iceland, 

 the Færoes and Finmark ; it is the property of the Botanical 

 Museum in Copenhagen. 



On the basis of this material, I have tried to show the 

 peculiarities which characterize Empetrum nigrum in Arctic regions. 

 As this is best done by comparison with the features this plant 

 presents when growing in a cold temperate climate, e. g. in Denmark, 

 I have, during these investigations, utilized also the material which 

 I had previously collected in Danish localities. 



The following literature has been consulted: — 



1. Abromeit, J., 1899: Botanische Ergebnisse der... unter Leitung Dr. 

 V. Drygalski ausgesandten Grønlandsexpidition. В. Samenpflanzen. Bibi. 

 bot. 42. 



2. Anderssox, G. and Hesselman H., 1900- Bidr. tili kännedomen om Spits- 

 bergens och Beeren Eilands kärlvaxtflora. Bih. t. K. Sv. V. A. Handl. 26. 

 Afd. III. No. 1. 



о. BöRGESEX, F., 189Ö: Bidrag til Kundskaben om arktiske Planters Blad- 

 bygning. Botanisk Tidsskrift. 17. 



4. Cleve, A.strii), 1901 : Zum Pflanzenleben in Nordschwedischen Hochge- 

 birgen. Bih. t. K. Sv. V. A. Handl. 26. Afd. Hl. No. 15. 



5. DusÉx , P., 1901: Zur Kenntniss der Gefässpflanzen Ost-Grønlands. 

 Ibid. 27. Afd. III. 



6. Haglund, е., 1905: ür de högnordiska vedväxternas ekologi. Uppsala. 



7. Hartz, N. E. K., 189-4: Botanisk Bejseberetning fra Vest-Grønland 1889 



og 1890. Medd. om Grønland. XV. 



8. —, 1895: Øst-Grønlands Vegetationsforhold. Ibid. XVIII. 



9. JuNGNER, 1894: Klima und Blatt in der Regio alpina. Flora. 



10. Kihlman, A. O., 1890: Pflanzenbiol. Stud. aus Russ. Lappland. Acta 

 80C. pro fauna et flora fenn. VI. No. 3. 



11. KoLDERirp Rosenvinge, L., 1896: Det sydligste Grønlands Vegetation. 

 Medd. om Grønland. XV. 



12. LiNDMAx, C. A. M., 1887: Bidrag till kännedomen om skandinaviska 

 fjällväxternas blomning och befruktning. Bih. t. К. Sv. V. A. Handl. 12. 

 Afd. III. No. 6 



