Primulaceae. 185 



appear as being short-styled (fig.lO,i*'), and the flower illustrated 

 in fig. /, when compared with this might be looked upon as 

 the corresponding Jong-styled form; considering, however, that 

 this fig. / depicts the longest styled flower I ever found, 

 and that the length varies generally between that given in 

 fig. / and in fig. E, while no flowers are found with the 

 stigma below the anthers, I must look upon the form, illu- 

 strated in fig. F, as being accidental and of no great im- 

 port." 



To this I have only to add the following: Although the 

 most common form amongst flowers from Norway is like 

 that illustrated in fig. 10 E, yet it seems that long-styled 

 flowers (as in fig. 10, /) are not so very rare. I have also 

 found a few short-styled flowers (as in fig. 10, F). A diffe- 

 rence was noted in the size of the stigma-papillae of the "long" 

 and "short"-styled types, though this was certainly small. 

 Flowers from Iceland all resemble the type in fig. 10, E. 

 The pedicel is lengthened a good deal after the flowering. 

 Anatomy. The adventitious roots are 4-rayed. The 

 epidermis dies away quickly, and the protective function 

 is transferred to the outermost layer of the primary cortex 

 which becomes an exodermis, the cefls of which are slightly 

 cutinised on the outer and, to some extent, also on the 

 lateral walls. Single crystals are frequent in the exodermal 

 cells. Distinct Casparian spots occur on the radial walls of 

 the fairly well-marked endodermis. 



The more vigorous adventitious roots exhibit an incipient 

 development towards the secondary type, in that the middle 

 of the central cylinder is filled with hadromal elements, while 

 the leptome groups increase in size; but no continuous 

 cambium is formed, because the groups of meristematic cells 

 situated between the protohadromal rays do not succeed in 

 joining outside these. Young roots have the cortical cells 

 filled with starch. 





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