214 Fr. J. Mathiesen. 



The main bud of the Primula species developes in the 

 axil of the uppermost foliage-leaf, and generally produces a 

 few leaved rosette, almost simultaneously with the flowering 

 of the parent shoot. During the autumn some of the leaves 

 remain in the scale-leaf stage, and as bud-scales form 

 a protection for the embryonic tissues in the winter-bud. 

 In spring these tissues develop into regular foliage-leaves (the 

 spring-rosette) and the growth of the axis terminates with 

 the formation of the peduncle. 



^Buds can, however, sometimes develop in the axils 

 of other foliage-leaves, thus forming a "rhizoma multiceps". 

 As adventitious roots develop in abundance, and (as mentioned 

 above) the rhizome of the Primulas quickly perishes from 

 behind, it is possible for vegetative propagation of these 

 species to take place. A single individual may disintegrate 

 into a larger or smaller group by the dissolution of the parts 

 connecting the mother rhizome with, its branches, so that 

 the latter, by the development of adventitious roots, be- 

 come independent plants. 



The leaves have a mesomorphic structure. 



3. Androsaces septentrionalis appears most frequently as 

 a hapaxanthic winter-annual. The seeds germinate 

 in the late summer, and before the approach of winter 

 the plant has formed a small leaf-rosette, closely pressed 

 towards the ground, and with a strongly developed main 

 root. Bud-scales are not present, but the tip of the axis is 

 protected by the half-developed innermost leaves of the 

 rosette. During the spring following, the axis completes 

 its growth by the development of a peduncle, and in the 

 case of robust individuals, other flowering shoots are developed 

 in several of the axils of the foliage-leaves. 



The leaves developed during the autumn, hibernate and 

 have a somewhat xeromorphic structure and appearance (the 

 felted hair covering). Brundin states, that Androsaces sep- 



