XII. Some Observations on „the Parts of T in: E 
with Characters and Descriptions of Two New Genera of that 
Order. By Mr. Robert Bro#n, Lib..Linn. Soc... 
Read June 20th, 1809. ; 
Tus account which the celebrated Hedwig has given of the sexes. 
of Mosses, seems to be founded’on so ample an induction, and is. 
now so generally received, that it must be necessary to notice 
the arguments which mere theoretical Botanists have from time 
to time produced against it.. There is, however, one author,. 
. Mons. Palisot Beauvois, who has not only objected. to the ac- 
count of Hedwig, but has proposed a theory of his. own, and: 
who consequently appealing to actual. observations, and appear-- 
ing to have particularly studied, specifically at least, this tribe of: 
plants, merits some attention. ‘The earliest account of Mons. 
Beauvois' theory is.to be found in the observations added to the 
order Musci in the Genera Plantarum of Jussieu ; and it was. 
soon after more fully given by the author himself,in a Memoir 
on the Sexual Organs of Mosses, published in the third volume: 
of the American Philosophical Transactions: since that time he 
has in his different works occasionally treated of the same 
subject, and has lately repeated the substance of his original. 
essay, in the introduction to his * Prodrome de Cinquieme et Sixi- 
eme Familles de l’/Ethiogamie,” published at Paris in 1805, a. 
translation of which is given by my friend Mr. Konig, in the 
second volume of the Annals of Botany. To this work, as it must 
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