366 MISS HILDA M. CUNNINGTON ON THE 
elongated passages, considerably larger in area than the parenchyma-cells of the 
trabeculæ separating them, and are irregular in size. At irregular intervals these are 
spanned by horizontal and occasionally longitudinal diaphragms one cell thick. 
The vascular system is bisymmetric, and consists of two large bundles situated at the 
points of trisection of the long axis of the ellipse (text-fig. 8, a, a’) and an ellipse of 
small peripheral bundles, 28-30 in number, in the continuous peripheral parenchyma, 
all of which anastomose frequently with each other. The former may be known as the 
median and the latter as the peripheral bundles. The two peripheral bundles near the 
ends of the short axis of the ellipse are slightly larger and nearer the centre than 
the rest of the bundles (text-fig. 8, n, n). 
All the bundles are oriented with their xylem inwards and present the same structure 
as the bundles of the leaf, except that the phloem prosenchyma is never thickened. 
This peduncle retains the same structure throughout its life. In the large central 
bundles there are two or three spirally thickened vessels which are hard to distinguish 
in many places. 
In some sections the bundles have a bicollateral appearance, due to the arrangement 
of the parenchyma-cells. 
Very few tannin-cells are present. 
The Inflorescence (text-fig. 6).—The two median bundles (text-fig. 7, «, «) run 
upwards parallel until they reach a point two-thirds of the length of the tongue-shaped 
receptacle; here they bend and, forming an arch, fuse at the top (text-fig. 6). 
At the bend each median central bundle gives off three bundles, one of which (c) bends 
obliquely down in the median plane till it reaches the point of insertion of the braets. 
Here it bends up and runs up the adaxial side of the bract, forming the large median 
bundle of the bract. : 
The two other branches of the central median bundle, from the same point, bend 
laterally obliquely down and up again, forming the marginal bundles of the bracts. 
The fusion-bundle at the top of the arch emits about 30 small branches (the two 
median ones, ġ, b, being shown in the figure), which ascend obliquely outward. Each of 
these divides into two (2,07); one branch (5 ascends, and meeting fuses with the 
remaining 29, while the other branch (b") bends down and descends to the point of 
insertion of the bracts. From these branches ( p) arise and run outwards into the 
pedicels of the male flowers, one branch to each pedicel. 
Halfway between the bend and the terminal fusion of the median central bundles 
each emits a large median branch (d), which passes obliquely upwards and outwards 
for a short distance and fuses with the descending branch (b") of the median bundle 
from the top. 
Below the insertion of the bracts a median bundle (g) between the central and 
peripheral bundles divides into two branches (g^. g"), one of which (g') passes up into the 
"receptacle" and fuses with the descending large median bundle destined to become 
the median adaxial bundle of the bract, The other (g") passes straight up into the 
bract, and could be traced no farther. Here also the peripheral bundles of the peduncle 
anastomose among themselves and pass straight up into the hract and form the smaller 
