2D AU 
NUV 
Introduction. . 
In this short paper, following the method I adopted in my 
paper Ericineæ (Pirolaceæ, Ericaceæ) 2. The biological 
anatomy of the leaves and of the stems,’ I intend pointing 
out such characters in Diapensia lapponica as are more particularly 
connected with the climatic factors. As this species has been very 
exhaustively described in the literature which deals with it, there 
have been only a few new data for me to record. 
I have had a fairly large quantity of material at my disposal 
from West and East Greenland and from Finmark, which has en- 
abled me to verify the different statements. 
A List of the chief Literature: — 
BÖRGESEN, F., 1895: Bidrag til Kundskaben om arktiske Planters Blad- 
bygning. (Botanisk Tidsskrift, Bd. 19.) 
Creve, A., 1901: Zum Pflanzenleben in Nordschwedischen Hochgebirgen. 
(Bihang till kgl. sv. Vet. Ak. Handl., Bd. 26, Afd. III, 15, Stockholm.) 
GREVEL, W., 1897: Anatomische Untersuchungen über die Familie der Dia- 
pensiaceae. (Bot. Centralblatt, Bd. 69.) 
HESSELMAN, H., 1900: Om Mykorrhizabildningar hos arktiska växter. (Bihang 
till kgl. sv. Vet. Ak. Handl., Bd. 26, Afd. III, 2, Stockholm.) 
LinpMaAn, C. A. M., 1887: Bidrag till kannedomen om skandinaviska fjäll- 
vaxternas Blomning och Befruktning. (Bihang till kgl. sv. Vet. Akad. 
Handl., Bd. 12, Afd. III, 6, Stockholm.) 
SERNANDER, R., 1901: Den skandinaviska vegetationens spridningsbioiogi. 
Upsala. 
SKOTTSBERG, C., 1900: Einige blütenbiologische Beobachtungen in arkt. Teile 
vom schwedisch Lappland. (Med. frän Stockholms Högskola, Nr. 210, 
Stockholm.) 
SyLVEN, N., 1906: Om de svenska Dikotyledonernas första Förstärknings- 
stadium. (Kungl. sv. Vetensk. Akad. Handl., Bd. 40.) 
Tevıy, H., 1892: Bidrag till kannedomen om primäre barken hos vedartede 
dikotyier. Lund. 
1 The structure and Biology of the Arctic Flowering Plants, I, Meddelelser 
om Grenland, Vol. XXXVI, 1908, p. 75. 
