85 



■m 



described above, the only difference being that the margin of 

 the final leaves of 5. glanca is entire and never toothed, as in 

 the other species. Otherwise the structure of the cotyledon^ 

 the primary root, the presence of a hypo- and epi-cotyl and the 

 scale-like shape of the first three to five leaves agree entirely 

 with what we have seen in 5. rotundifolia. In regard to the 

 development of the rhizome there seem, however, to be some 

 slight differences, by which the underground parts of these 

 two species, at least at a later stage, are to be easily distin- 

 guished. 



The -rhizome ^{ S. glaiica, figured in Figs. 124-126, is 

 strongly tuberous and consists of a chain o{ tubers, due to 

 the sw^elling of the short internodcs of the subterranean stem, 

 and in such a manner that each tuber represents from three 

 to four internodes, the leaves of which are scale-like and very 

 broad. From each tuber proceeds a stem, of which the lower 



^ 



leaves are scale-like and partly sheathing. The direction of 



■ ■ 



the stems is ascending, and after having reached the surface 



of the ground the final leaves will replace the scale-like 

 ones. . . . 



The whole rhizome shows a great similarity to that of 

 Polygonatwn, excepting that the stems exist for several years. 

 Fig. 124 shows the rhizome of a younger specimen. Only two 

 stems have been developed, of which a is of this year's 

 growth, not having yet penetrated the ground, while the other 

 one, b, in the figure, represents the base of a stem that is evi- 

 dently three years old. The rhizome itself is horizontal with 

 cylindrical internodes, whitish, and does not emit any large 



« 



number of roots. They, the roots, are rather few and are 

 especially developed from the inferior part of the tuber. The 

 larger rhizome, Fig. 126, is from an older plant, and we see 

 here three tubers and altogether three stems of different ages. 

 The course, in regard to the wdiole development of the tubers 

 and the stems, is, however, the same as shown abov^e ^ox the 

 younger specimen (Fig. 124). It is to be observed very dis- 

 tinctly in the older specimen, that the stems are supported by 

 the subterranean scale-like leaves of the tubers, and we see, 

 for instance, in B a small wart-like body, which is a bud, 



