4 
seeds, which fill nearly the whole capsule, it often escapes observa- 
tion, and many of these genera have repeatedly been described as 
having an unilocular fruit. 
From the latter consideration it has been usual, however, to refer 
these supposed unilocular genera to Primulaceg, an order perfectly 
well marked by a very different and a much more important character, 
that of the situation of the stamens, which are opposed to, not alter- 
nate with the petals, showing them to belong to the inner set of a 
double series of stamina, whereas in Scrophularinez the stamina 
are constantly alternate with the petals, and if the normal number be 
really double that of the petals it is the inner series that is con- 
stantly abortive, leaving, as far as has been hitherto observed, no 
trace in any instance, unless, indeed, the deeply cleft disk, described 
Martius as encire ing the ovarium in Herpestis lanigera, or the 
scales in the tube of the corolla of Artanema, be considered as abor- 
tive stamina. 
Schwenckia, hitherto referred to Scrophularinew, has the stamina 
may be scarcely necessary to mention Gentianee among the 
affinities of Scrophularinee, as their symmetrical flowers and the 
phularinee, mark them out at once.t Disandra, an anomalous 
genus of Scrophularinex, has something the habit of Villarsia, but I 
have not had an opportunity of examining sufficiently good speci- 
mens to form any opinion as to its real situation. 
The limits of the order, if it be thus correctly defined and marked 
out so many neighbours upon whose territory it appears to 
encroach, still remain very wide, and embrace groups considerably 
removed from each other in many points of view, but which yet 
appear too closely allied to be separated otherwise than into tribes or 
suborders. Of these I have, in the above-mentioned paper, pro- 
posed twelve, some of which may be thought natural, others are 
certainly purely artificial, but from the imperfect materials before 
me I have been unable to circumscribe them more satisfactorily. 
A few remarks which I have now to add upon each will show 
some of the. difficulties I have met with, and may induce other 
* The fifth stamen is, however, generally sterile, 
+ See Lindl. Introd. 229. 
