72 DEVELOPMENT OF THE FLOWER 
which a simple style is occasionally divided, may be cited 
as proofs of its being a double organ; and the sulcus, I 
am inclined to adduce as an argument against the probabi- 
lity of the midrib of a carpellary leaf bearing ovula. 
Few things can be more striking than the extreme similarity 
of all the parts of the flower at such periods. 
The highly foliaceous calyx, the intensely coloured corolla, 
the complex stamina, are at such periods distinguishable - 
only by situation ; these last perhaps also by their internal 
convexities. 
Out of such simple cellular bodies does nature organise 
a highly foliaceous calyx, an intensely coloured corolla, a 
complex stamen. 
n the course of my enquiries I have submitted many 
pistilla to examination at very early periods. I have found 
that they consist at their first stage of a fleshy scaly body, 
convex on its inner surface. They may be often compared 
to a cup with an undulated margin, rather connivent or com- 
pressed. Each undulation marks the upper free edge of the 
carpellary leaf, and its highest point is the apex of the style. 
The situation of the stigmata in some plants, such as Papa- 
veracez, has appeared to many Botanists so anomalous as to 
authorise an assumption of the origin of the ovula from the 
midrib, although it would, to my thinking, be more natur- 
ally explicable by assuming an adhesion between the stig- 
mata, somewhat analogous to that which causes the loculi- 
cidal dehiscence of fruits. 
In stigma terminating as in the case of Papaveraceze, just 
adverted to, the lines of union of the carpellary leaves 
may be two, either in the axis of the sinuses as in a. Pl. 
29. Fig. 4, or in the axes of the teeth as in 5. in which 
case the apex of the style will not be the highest point of 
the carpellary leaf, which it generally, if not universally, 
is. In neither, is there any difference in the amount of 
cohesion of the stigmata. The placente of Papaveracee, 
will be found as in a, in other words, a line dropped from 
the summit of each component part will fall into the space 
between the parietal placente. 
