STIGMA IN PAPAVERACEZ AND CRUCIFER2. 69 
A more beautiful provision could scarcely occur ; for we 
not only have the stigmatic tissue occupying a most novel 
situation in consequence of the consolidation of the stigmata, 
but we have it endowed with peculiar powers of secretion 
to alleviate the difficulties occurring in the way of impreg- 
nation.* 
* * * Li * * 4. * * 
This explanation of Papaver, only assumes the intimate 
union of the stigmatic lines with each other. See Pl. 29. 
Fig. 1.4 
The explanation by opposition assumes an axillary situation 
of placente very unusual if ever it occurs, and also a simple 
style having two lateral, and no central vessels, of which 
I had an instance. 
Argemone mexicana.—In this the stigmata would be des- 
cribed as 4.5 reniformia, margine supero inter se confluentia. 
These reniform lobes are opposite the placentz. The ovari- 
al vessels are the marginal vessels (no dorsal vessels occur 
even in fruit) of the leaf, but the marginal ones send off nu- 
merous reticulating branches; on reaching the style, each 
passes up, separately from the marginal veins of its neigh- 
bouring carpella, and ramifies in the style. 
The placente occupy the sinuses of the angles; the 
most convex parts of the ovaria are the dorsal of the leaves, 
and these correspond with the highest part of the stigma, as 
they should. 
The stigmatic surface is evidently traceable to the placentee. 
Explanation as in Papaver; the reniform lobes are com- 
pound. 
Pl. 29.—Fig. II. a, b b, c, d.{ Papaver Argemone. 
A blank occurs here in the MS. intended, as would appear from what follows, 
to be filled up by observations on the genus Papaver. 
t a, disk with stigmata; b b, sections of the capsule; c, substigmata gars 
traceable to the upper part of the Placenta by fleshy tints; d, style; e, midri 
f, stigma ; g, venules of a carpel leaf. 

I Part ponding to the sa ferences in Papaver, Fig. 1. 
