19 



instrumental in marking the limits of each year's growth fairly 

 distinctly, ought strictly speaking to be called scale-leaves (see 

 Fig.lOG, H]. The year's growths are rather short, only from 

 one to two cm. long. 



According to Haglünd assimilation may take place in the 

 foliage-leaves for several years, but no definite proof of this 

 has been given. In Greenland I found three-years-oid leaves 

 which were still green. 



The flowers, numbering from one to six, are situated at 

 the apex of the branches (Fig. 10 Ä, B)\ they spring from the 

 axils of the foliage-leaves which occur immediately 

 below the rudimentary uppermost parts of the 

 branches. After flowering the whole of the floral 

 portion of the shoot dies. The leaves, which subtend 

 the flowers (Fig. 10 D) are relatively broader than the 

 other foliage-leaves (Fig. 10 C; Fig. 1 1) and a smaller 

 portion of their margin is rolled back. 



The flowers have two thin bracteoles at the 

 base of their stalk (Fig. 12 Л). 



After the floral portions of the shoots have 

 died, two to several new foliage-bearing shoots 

 arise in the axils of the leaves immediately below 

 them. 



There is a certain periodicity in the plant's 



Fig. 11. 

 Phyllodoce 



caerulea 



( Bri/anthus 



coeruleus) 



A leaf seen from 



flowering, and this is the case with the plants in <ье dorsal side. 



(E.W., 1887.) 



the whole of the district in question. Thus the 



species flowers sparingly or scarcely at all during certain years, 



and then there follows a year rich in flowers (Haglünd). 



The flowers are formed during the year previous to that 

 in which they open. 



The following I find to be the '-flower-biology;" the 

 account dilTers considerably from that of Axell (1869). 



In Greenland the flowers are among the earliest spring 

 flowers, they are very conspicuous, being raised into the 



