7t 



on this specimen (Fig. 58), of which the three oldest showed 

 the same form as the ones mentioned above (Figs. 55-57), 

 while the two younger were almost cuneate and bidentate, 

 pubescent on both surfaces as well as on the petiole. The 

 plant now continues its growth in this manner, develop- 

 ing a leafy rosette upon the apex of the short rhizome, and 

 some buds will also develop in the axils of these leaves, so 

 that the rhizome finally will carry a crown of leafy rosettes, 

 some of which will contemporarily produce flowering stems 

 in the following years. 



DROSERACE^. 



*. 



Dioitaca miiscipula. 



The very first stage of germination, figured on Plate X, 

 Fig. 60, shows the development of the primary root, which is 

 densely covered with blackish hairs, especially at its upper 

 part where it joins the hypocotyl. For some time the testa 

 of the seed is carried by the apex of the cotyledons, but after 

 it drops off the cotyledons spread a little (Fig. 61), and 

 the plumule begins to form the first leaves. These, even 

 the first one next to the cotyledons (Plate XI, Fig. 62), show 

 the characteristic shape and peculiar function which has made 

 the plant one of the most interesting in the world. The 

 germinating plantlet can now be characterized as having nar- 

 row lanceolate cotyledons, a distinct hypocotyl and a relatively 

 short, blackish-hairy primary root. While the leaves begin to 

 develop in the form of a small rosette, the growing point is 

 moved from its original place between the cotyledons to out- 

 side these, as has been shown in Fig. 63. At this point the 

 first secondary root is developed just below the foremost part 

 of the horizontal, now creeping axis, and it is already indi- 

 cated how the plant will continue its growth. A distinct 

 horizontal rhizome w^ill be developed, which is very easily 

 seen in the older plants, o{ which one is figured in Fig- 64, 

 while Fig. 65 shows a longitudinal section of the same speci- 

 men. The fresh leaves form a rosette, as has been described 

 by various authors, but it is by no means correct to call the 



