6/i 
certain Orders of the Ranales. 
concentric , the two lateral horseshoe-shaped, one of which still retains 
phloem on the ventral side and the other one phloem on part of that side 
only ; both of them still retain the bast-fibres on that side. 
In the upper part of the petiole one lateral exhibits concentric structure 
with a small inverted ventral segment detached, as if about to pass away 
from the main strand ; the other lateral and the median bundle have a gap 
on the ventral side ; the latter bundle has a small strand belonging to the 
gap some way out on the ventral side ; lower down is an arc of about five 
collateral bundles. 
Stem : By subsequent fusion three bundles are eventually left which 
unite with the stem-cylinder, the large median one doing so first and then 
the two laterals (Figs. 34-37). 
Eupomatia Bennettii , F. Muell. 
Leaf'. There is an arc of several (about seven) collateral bundles 
throughout the organ. 
Mon odor a Myristica, Dun. 
Leaf : There is an arc of collateral bundles throughout ; in the upper 
part of the petiole are three large bundles, the two lateral of which tend 
to round off somewhat. These arc-shaped bundles (as in the case of all 
such leaf-bundles wherever they may occur) are due to fusion between the 
lateral bundles of the dorsal side and a bundle or bundles passing across 
from the ventral side, these latter being a vestige of the ventral part of 
a primitive cylinder. (Cf. the concentric and sub-concentric bundles of 
Artabotrys , Polyalthia , Paeonia , Berberidopsis ) & c., all of which represent 
identical structures and have the same explanation.) 
Uvaria zeylanica , L. 
Leaf\ In the lamina is a complete cylinder in which the bundles are 
not individualized ; it is much flattened on the ventral, and convex on the 
dorsal side (Fig. 38) ; in the upper part of the petiole a small gap begins 
to appear in the middle region of the ventral side, which is barely bridged, 
i. e. phloem only occurs in that place ; a similar gap appears on one side 
of the cylinder near the angle between the dorsal and ventral parts. 
Passing downwards both these gaps become accentuated ; in the second 
gap above mentioned a small bundle then arises de novo ; shortly afterwards 
connexions take place between the ventral part of the future lateral bundle 
of that side and the small bundle in the gap ; then the former splits into 
two, of which one part fuses with the small bundle which arose in the 
gap ; and then these two, along the part of the cylinder at the angle, 
go to form the lateral arc-shaped bundle, while the other part fuses with 
the arm of that side of the large dorsal part of the cylinder. The same thing 
