Mr. BnowN's Observations, ác. 77 
on the Botany of New Holiand, appended to Captain Flinders's 
Voyage to Terra Australis. : 
To these observations I shall add some remarks on certain ge- 
nera of Compositz, which occur repeatedly under different names. 
in late systematic works, and whose structure and limits appear 
to be imperfectly understood. 
_ My first observation relates to the peculiar disposition of the © 
nerves or vessels of the corolla of this family of plants. 
In the essay already mentioned, which appeared early in the 
summer of 1814, I have noticed this peculiarity in the following 
terms : 
“The whole of Composite agree in two remarkable points of 
structure of their corolla; which, taken together at least, materi- 
ally assist in determining the limits of the class. The first of these 
is its valvular estivation ; this however it has in common with 
several other families. ‘The second I believe to be peculiar to 
the class, and hitherto unnoticed. It consists in the disposi- 
tion of its fasciculi of vessels or nerves; these, which at their 
. origin are generally equal in number to the divisions of the co- 
rolla, instead of being placed opposite to these divisions, and 
passing through their axes as in other plants, alternate with them; 
each of the vessels at the top of the tube dividing into two equal 
~ branches, running parallel to and near the margins of the corre- 
sponding lacmiæ, within whose apices they unite. These, as they 
exist in the whole class and are in great part of it the only ves- 
sels observable, may be called primary. In several genera, how- 
ever, other vessels occur, alternating with the primary, and occu- 
pying the axes of the laciniz: in some cases these secondary ves- 
sels being most distinctly visible in the laciniæ, and becoming 
gradually fainter as they descend the tube, might be regarded as 
recurrent; originating from the united apices of the primary 
branches ; 
