STUDIES IN PLANT REGENERATION 209 
the roots into the new shoot. The thickening was much more 
pronounced on the upper side than on the lower. 
The Juhlenbeckia stem, as it develops from the cutting or 
seedling, is round and leaf-bearing ; but it very shortly widens out 
into the flat, thin, leafless organ, characteristic of the ѕресіеѕ.* 
Fic. 7. Cutting of a stem of Muhlenbeckia platyclados s which the bud estab- 
lished a secondary vascular connection with the regenerated г roo 
A comparison between the round and flat portions of such a young 
stem shows that the number of bundles is approximately the same 
in the two, and that the difference 1 in surface is accounted for by 
d deant alant eir 
HAE Е. Же адаа ап Keim 
Zeit. 50: 2. 
lingen und Steckliagett Bot. 
