96 DEVELOPMENT OF THE FLOWER. 
indicated by 2 lobes, and these occupy the great bulk of the 
clavate portion of the style. 
The ovarial vessels are curiously disposed, the axis of the 
anticous carpellary leaf, that which has the stigma has one 
vascular bundle, which terminates below the stigmatic point 
in a clavate, perhaps subradiate head. The axes of the 
other leaves have no vessels. The placental medial line 
of all three has one vessel, and subsequently, lateral vessels 
would seem to appear in each carpellary lamina. 
Now although this shews that there is a relation between 
the perfection of the stigma and possession of vascular sup- 
ply, and also that the lamina of a carpellary leaf may have 
no vessels ; yet it does not disprove the rule that when there 
is one vessel, it occupies the axis of the leaf. 
Papaver. On the assumption of the adhesion between 
the placente of each cell with the right and left hand 
placent of their neighbours, and which is of very frequent 
occurrence, Papaver is easily explainable. "The pistillum 
consists of a number of wedge-shaped carpellary leaves, 
the inflected margins of which cohere with those on either 
side of them, and which do not meet in the axis; a line 
dropped from the apex of the wedge falls into the space 
between the two placentz, whereas if the stigmata were in 
common parallism opposed to the placentz, it would fall on 
the line of their axes. 
The chief remarkable thing in Papaver, is the great size 
of its placentze, for I do not consider them septa from the 
consideration of other genera of the order, and from their 
structure, which is entirely that of placentz, presenting no 
especial lines of venation ? and also because of the direction 
of the development of the ovula, which in all cases is greatest 
towards the point of union of the involute margins ; whereas 
in Papaver, the extreme margin, which, if these were septa, 
would correspond to the line of cohesion, is destitute of 
ovula. It is a good instance of a cruciferous septum. 
Nor must I omit the membranous appendage of the outer 
end of the stigmata, the sinuses of whose lobes correspond 
