83 
and Affinities of Trapella. 
The relations of the parts may be elucidated by the 
examination of a number of transverse sections, taken through 
the flower at different heights. Such a series is given In 
Figs. 40-45, In these sections the vascular bundles running 
to the different floral organs are variously coloured. Those 
to the carpels are blue , to the stamens yellow , red to the 
petals, and green to the calyx-lobes. Fig. 40 Is a transverse 
section cut half-way down the ovary. The rudimentary 
anterior loculus (red. /.) is a mere slit in the thick wall of 
the ovary, co-extensive however with the fully-developed 
(posterior) loculus (loci). The position which should be 
occupied by the vascular bundle to the posterior stamen — 
which has become obsolete— -is indicated by a x . Of the 
four bundles (blue) belonging to the carpels n the anterior 
and posterior ones are continued unbranched to the top 
of the ovary, and up the style (cf. Figs. 40-45). 
The other pair, lying right and left in the partition, supply 
the two ovules, the right-hand one the sessile (ov. 1 ), the left- 
hand one the stalked ovule (ov. 2 ). 
Fig. 41 is cut just at the insertion of the spines. Five new 
bundles, tinted brown, are seen, outside and opposite the red 
ones of the corolla; these run into the five spines, and are 
inserted on those which pass up to the corolla. 
In Fig. 42 the section passes through the base of the free 
part of the ovary, the calyx-tube being seen on the outside 
free from it. Corolla and stamens are not drawn, having 
fallen away. Fig. 43, higher up still, shows the insertion 
of the lower stalked ovule and the bundle passing to it ; 
Fig. 44 that of the upper sessile ovule. The bundle to this 
ovule is seen cut across twice — due to its arching over before 
running to the ovule (cf. also Figs. 19 and 20). In Fig. 43 
is seen projecting into the anterior reduced loculus the 
small cellular cushion (r), which may be possibly an ovule- 
rudiment. Later it becomes tightly pressed against the 
outer wall of the ovary, and possibly assists in the 
transfer of nutriment from the ovary-wall to the ripening 
ovule. A longitudinal section through this rudiment is 
