Caprifoliaceae. 1^5 



the rejuvenating runner, bearing buds, which, as described later, 

 become fructification or assimilation shoots, respectively. In 

 its third year the plant has reached its full development, con- 

 sisting of a main root (which can live a few years), some 

 adventitious roots, and two succesive long-shoots. 



Morphology of the Stem. Linnaea borealis L. is an ever- 

 green woody plant (not an undershrub) with a long, creeping 

 main axis, sending off rootlets, and bearing two kinds of 

 erect, short shoots, which according to their function may 

 be called, respectively: assimilation and fructification shoots 

 (Witt rock). 



The Rejuvenating Shoot. The rejuvenescence takes place 

 by the terminal bud of the main axis yearly producing a 

 creeping shoot, 6 — 45 centimeters long, consisting of 10 — 16 

 internodes, the individual length of 

 which is lessened towards both ends /p?^ 

 of the shoot. Wittrock mentions, ^° 

 that these shoots can reach an age //o ^сг-ч 



of up to 13 years. The plant ^V 



can quickly spread over large \\p 



areas. The terminal bud is covered ,^ 



-^ 



by rudimentary green leaves, which ^'^^ ~^yj 



do not wither during the next .^^ 



period of growth, but on the con- Fig. 1. 



trary lengthen somewhat in their Di^^am, shelving the more vigorous 



*' ° buds (the larger circles) supported 



outer half, and act as organs of Ьу the leaves placed on the under- 

 side of the rejuvenating shoot. 



assimilation. As a rule all the 



leaves of these rejuvenating shoots support buds, which 

 during the next period of growth develop into one of the 

 three kinds of shoots. Generally however one of the two 

 buds of a leaf-pair becomes a "dormant bud", while the 

 other, distinguished by its greater size, develops into an 



