considerably under differing conditions of life (see Kjellman, 

 Lange and Warming). According to Haglünd the largest leaves occur 

 on basal shoots and on those which have remained for several 

 years in a vegetative condition. 



The buds are protected by scale-leaves, and the limit of 

 each year's growth is distinctly marked (Fig. 1). A branch 

 generally requires two or more years to attain the maturity 

 required for flowering. According to Hagldnd the plant flowers 

 periodically every other year; I have found from two to four 

 years to intervene between the flowering periods. 



The plant flowers in 

 spring. The inflorescence is 

 a terminal, many-flowered 

 umbelliform raceme. The 

 flowers are formed during 

 the summer previous to that 

 in which they open, and are 

 enclosed in a terminal bud 

 which is protected by scale- 

 leaves, and is somewhat 

 larger and more globular 

 than are the vegetative buds 

 (Fig. 1 Л and D). Foliage- 

 leaves do not occur on this 

 flowering year's-growth. 



Fig. 1. Ledum palustre var. decunibens 

 Disko; June 8, 1907 (slightly magn.). 



A, A floral terminal bud. B, Portion of a branch 



with limits of two year's growths. C, A leaf, dorsal 



view. D, A branch like A, but with vegetative 



terminal bud. (E. W., 1907.) 



After setting fruit the whole of the floral year's-shoot dies. 

 Immediately below it there is developed during the summer 

 either a single branch or several (as many as five), rather closely 

 placed, and often arranged almost in a (spurious) whorl. The 

 rest of the main shoot remains branchless. 



The flowers emit a powerful perfume which evidently 

 increases towards night. The question arises whether the strong 

 scent of the whole plant may not be in this as in other j:,âS€^ 

 a guide to insects. 



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