158 



О. Hagerup. 



without any difficulty can enter the corolla by reason 

 of its large opening. Besides, visits by Lepidoptera and 

 Hymenoptera have been observed. The ovary is trilocular, 

 two compartments containing several ovules which do not 

 develop, while the third contains one only, which however 

 is fit for development. 



cu 



& 

 £ 



Fig. 2. Transverse section of the rejuvenating shoot 

 (material from Greenland). 



Compared with material from Denmark, the Arctic Lin- 

 naea has a compact growth, owing to shorter internodes; 

 this mode of growth causes the deviating habitus, peculiar 

 to many Arctic plants. 



Anatomy of the Stem. The bark and the wood together 

 only amount to half the diameter of the stem, the pith 

 being relatively strongly developed. The bark passes through 



