6o 
Rev. T. A . Jeijeries. 
selves, and frequent larger lacunae, shown in the figures, where 
rupture of cells has taken place. The endodermis is not conspicu¬ 
ous, but the pericycle of small compact cells is clearly distinguished 
from it. Within the pericycle, and with it comprising an inner 
strengthening layer, we get a strong ring of schlerenchyma. 
Embedded in this mechanical tissue is a series of vascular bundles 
having abundant, thick walled, woody elements: the bundles are of 
Tmuca fcSF&u* @'feKSfc:. 1 
Fig. 5. Transverse sections of erect aerial stem, diagrammatic : A, 
through thick part of basal internode; B, through thin part of same ; C, 
through portion enclosed by leaf sheaths ; D, a little below inflorescence, 
x 25. 
the usual monocotyledonous type, and many more are scattered 
inside this inner strengthening layer in an irregular double ring ; 
there are none in the centre of the stem. All the rest of the large 
central cylinder, the spaces between the scattered bundles and the 
whole of the centre is occupied by ground tissue specially modified 
to act as storage tissue. The cells comprising this storage tissue 
(see Pig. 6) are largest towards the centre of the stem. Their 
walls are enormously thickened, the middle lamellae being traceable 
in most cases through the middle of the walls, especially in the 
