44 BoTAny. 
walled cells, which constitute a true meristem-tissue, to 
which the name of Cambium * has been given (¢, ¢, Figs. 26 
and 27). Next to the cambium lie, in order, sieve-tissue 
and soft tissue (parenchyma); these do not occupy separate 
zones, but are more or less intermingled, forming a mass 
Fig. 28.—Fibro- lar bundle of f F , 
teauticane iinguer ion se SS ee ee eaate a nuke e 
called the Soft Bast (y, y, y, Fig. 26, and p, Fig. 27). The 
sieve-tissue includes sieve-tubes and cambiform or latticed 
cells. In the extreme outer border of the bundle is a mass 
of fibrous tissue (8,5). The layer of starch-bearing cells 
* Cambium, a low Latin word meaning a liquid which becomes glutinous. 
-The term was introduced when the reul structure of the part to which it was 
applied was not understood. 
ay 
