744 ~ Mr. Brown on the Organs and Mode of 
Supplementary Note. 
Since the Paper on Fecundation in Orchidez and Asclepiadex 
was read before the Society, and a Pamphlet containing all its 
more important statements was distributed in the beginning of 
November 1831*, two essays have appeared on the same sub- 
ject. The first on both families by M. Adolphe Brongniart, in 
the numbers of the Annales des Sciences Naturelles for October 
and November 1831, but which were not published until Ja- 
nuary and February 1832: the second, by Dr. Ehrenberg, on 
Asclepiadez alone, in the Transactions of the Royal Academy of 
Sciences of Berlin, before which it was read in November 1831. 
M. Brongniart's statements respecting Oncurpzzx to a great 
extent agree with those of my essay. "They differ, however, in 
the following important points: : 
1st, He does not seem to be aware of the operation of insects 
in the fecundation of this family. 
2ndly, He considers the mucous cords in the cavity of the 
ovarium (first seen by M. Du Petit Thouars, with whose obser- 
vations he seems to be entirely unacquainted,) as a continuation 
of the tissue of the stigma and style, and as existing before the 
application of the pollen to the female organ. 
And 3rdly, He supposes that the male influence reaches the 
ovula in Orchidex before the inversion of the nucleus; an opi- 
nion founded, as it seems, on his observations on Epipactis, in 
which, as well as in some other genera of the order, this is the 
state of the ovulum in the expanded flower. 
.In AscrEgPrADEZ M. Brongniart’s observations, made chiefly 
in Asclepias amena and Gomphocarpus fruticosa, accord with my 
statements as far as relates to the application of the more convex 
* | may also refer to an excellent abstract of the Paper which appeared on the 
1st of December 1831 in the Philos. Mag. and Annals of Philosophy. 
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