The 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 Ferées 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. ÅBROMEIT, J., 1899: Botanische Ergebnisse der... unter Leitung Dr. 
v. Drygalski ausgesandten Grenlandsexpidition. B. Samenpflanzen. Bibl. 
bot. 42. 
2. ANDERSSON, G. and HESSELMAN H., 1900: Bidr. till kännedomen om Spits- 
bergens och Beeren Eilands kärlväxtflora. Bih. t. K. Sv. V. A. Handl. 26. 
Afd. II. No. 1. 
BÖRGESEN, F., 1895: Bidrag til Kundskaben om arktiske Planters Blad- 
bygning. Botanisk Tidsskrift. 17. 
4. CLEVE, Asrrip, 1901: Zum Pflanzenleben in Nordschwedischen Hochge- 
birgen. Bih. t. K. Sy. V. A. Handl. 26. Afd. Ill. No. 15. 
5. Dusty, P., 1901: Zur Kenntniss der Gefasspflanzen Ost-Gronlands. 
Ibid. 27. Afd. III. 
6. Hacuunv, E., 1905: Ur de högnordiska vedväxternas ekologi. Uppsala. 
7. Hartz, N. E. K., 1894: Botanisk Rejseberetning fra Vest-Grenland 1889 
og 1890. Medd. om Grønland. XV. 
8. —, 1895: Ost-Grenlands Vegetationsforhold. Ibid. XVIII. 
9. JUNGNER, 1894: Klima und Blatt in der Regio alpina. Flora. 
‚10. Kintman, A. O., 1890: Pflanzenbiol. Stud. aus Russ. Lappland. Acta 
co 
soc. pro fauna et flora fenn. VI. No. 3. 
co 11. KoLpEerup RosENVINGE, L., 1896: Det sydligste Grønlands Vegetation. 
5 Medd. om Grenland. XV. 
~ 12. Linnman, C. A. M., 1887: Bidrag till kännedomen om skandinaviska 
fjällväxternas blomning och befruktning. Bih. t. K. Sv. V. A. Handl. 12. 
Afd. III. No. 6. 
