432 Fr. J. Mathiesen. 



after the first flowering period; the main root is then less 

 vigorously developed, and slender adventitious roots, also from 

 the rhizome-portions of the innovation shoots, are abundantly 

 developed, a circumstance which permits those shoots to 

 continue their existence as independent individuals, after iso- 

 lation from the main shoot — consequently, the species can 

 be propagated vegetatively (cf. Ekstam). 



This difference in the growth is probably conditioned 

 by the nature of the habitat; the tufted individuals must 

 be assumed to have grown on drier soil, while the other 

 form must have lived in damper localities; the faet of my 

 having found Sphagnum in connection with the rhizomes of 

 many specimens of the latter type, indicates moist moss- 

 tufts as their habitats. 



As regards the duration of the first vegetative stage, it 

 is not possible for me to state anything with certainty, owing 

 to want of material; in a comparatively weakly-developed 

 individual, I estimated its extent as three years. 



Fig. 26, 1 shows an individual produced from an iso- 

 lated innovation shoot; (the figure has been drawn from 

 soaked herbarium-material, and is somewhat diagrammatic). 

 At the base of the relatively-main axis, we see the separation 

 surface (scar) along w^hich it has loosened itself from the 

 parent-shoot ; during its first year, the shoot has formed a 

 few-leaved rosette of foliage-leaves, and completed the year's 

 growth by the formation of scale-leaves, for the protection 

 of the "v\dnter-bud ; (at / some fragments of the first year's 

 leaves are seen; the bud A is dead). Next year a piece of 

 stem, about 1 cm long and only bearing 2 leaves, was first 

 produced, next a rosette of foliage-leaves, followed in turn 

 by scale-leaves, of which three still remain (two only can 

 be seen). The process is repeated in the following (3rd) year, 

 and simultaneously the buds C and D in the axils of the 



