named Rafflesia. 
13 
tinuing, which is also not unfrequent; or accompanied by va¬ 
rious degrees of divergence, as in many genera of Labiata ; in 
their complete continence while they remain parallel, as in Epa- 
cridece , Poly galea, and in some genera of Acanthacea ; and lastly, 
in the imperfect production or entire suppression of one of the 
thecae, as in Westringia , Anisomeles and Marantea. 
Increased development may in like manner be confined to 
the dilatation, elongation, or division of the connecting portion 
of the filament, of which examples occur in many Scitaminea , 
Orchidea and Acanthacea ; it may consist in the elongation of 
I have entered thus slightly at present into the proof of this type, derived from these 
deviations from regular structure, partly on account of an observation which I find in 
the second edition of the excellent Thtorie Elementaire de la Botanique of Professor 
De Candolle, to whom, in 1816, I had shown drawings of most of the instances of mon¬ 
strosity now mentioned. To these drawings, and to my deductions from them with regard 
to the structure of pistillum, I suppose the ingenious author alludes in the passage in 
^question. His views, however, on this subject differ considerably from mine, which he 
does not seem to have been aware were already published (Linn. Soc. Trans. 1. c.). 
My second observation relates to the more important differences between the antherae 
and ovaria, independent of their essential parts. 
In the Anthera the vascularity, with relation to that of the Leaf, may be said to be di¬ 
minished without being otherwise sensibly modified ; the pollen is formed in a cellular 
substance apparently destitute of vessels; and is always produced internally, or under 
the proper membrane of the secreting organ. 
In the Ovarium, on the other hand, the vascularity, compared with that of the Leaf, 
is in general rather modified than diminished; the principal vessels occupying the 
margins or lines of production, and giving off' branches towards the axis, whose vascu¬ 
larity is frequently reduced. The ovula constantly arise from vascular cords, and, with 
reference to the supposed original state of the ovarium, are uniformly produced exter¬ 
nally ; though by the union of its parts, whether in the simple or compound state, they 
become always inclosed, and, before fecundation at least, are completely protected from 
the direct action of light and of the atmosphere.. 
In Conifer a and Cycadea, however, according to the view I am disposed to take of 
them (Turkey’s Congo, append, p. 454.), this is not entirely the case. But these two 
families will perhaps be found to differ from all other phaenogamous plants in the more 
simple structure both of their ovaria and antherae. 
the 
