STIGMATA. 95 
lower is cup-shaped ; in both the stigmatic surface is con- 
fined to the upper margin. 
“In T. grandiflora, the lobes are united, and the stigmatic 
surfaces are confined to the margin of the funnel ; a plica- 
ture exists along the line of union of the lobes. 
Why the stigmatic line of the Meyenia's sh lip is 
interrupted, I cannot determine. See Pl. 28—Fig 
In all these the style has two vascular iuba: which 
are anterior and posterior. The limitation of the stigmatic 
surface to the line is curious, particularly as it is coupled 
with a similarity in the texture of the outer and inner sur- 
faces of the dilated portions of the style, although perhaps 
the inner is the more humid of the two. * 
As in these the inner surface of the dilatation is manifestly 
continuous with the canal communicating with the placenta, it 
is pretty clear that the functions of the stigmatic surfaces are 
different, inasmuch as penetration can scarcely take place. 
Another thing is remarkable, that the stigmatic surface 
does not run’ down the margins of the division of the lobes, 
but is distinctly limited to the upper rim of the dilatation. 
It will be curious if it be found that the stigmatic surface 
in no case runs down a line of separation. 
Linaria purpurea of Seharunpoor, has a bicrurate apex to 
the style, with a double obtuse mammilliform mucro in the 
centre of the sinus; it is analogous to Meyenia. The vas- 
cular fascicule are anterior and posterior ; the apex of each 
style is the mammilla: this is instructive, as proving that 
the ends of each dilatation of each style may. gradually 
become stigmatic, and that the stigmatic surface need not 
be. confined to the margin or to the interior surface, for 
here it occupies half the upper portion of each crus entire- 
ly. No abrupt demarcation between the stigmatic surface 
and style is visible. 
In Viola, only one stigmatic point is developed ; this is a 
circular opening communicating freely with the stigmatic 
canal in which the pollen tubes are at the proper place to 
be easily seen entering the ovula. The other stigmata are 
