84. = Mr. Brown’s Observations on the 
plant is more strongly marked than the primary, and from which 
indeed these connecting branches probably originate. 
It must, I think, be admitted by M. Cassini, that in many genera 
of Composite five vessels passing through the axes of the segments 
exist, even ten others are occasionally found, as in Helianthus, 
though these can hardly be traced below the insertion of stamina. 
But as it has been already shown that the lateral or primary vessels 
are not strictly marginal through their whole length, and as one 
instance has been Biden which their branches, if not them- 
selves subdivided, are at least connected by ramifications of the 
middle nerves*, it follows that a monopetalous corolla having in 
its tube fifteen nerves with distinct origins, three of which are con- 
tinued through each of its segnients, and unite together at the 
apex, would upon the whole better correspond with the definition 
M. Cassini has given of the corolla of Composite, than the actual 
disposition of vessels in that order. Now such a structure exists 
inthe whole of Goodenoviæ-, a family of plants very nearly related 
ci ih to 
-** M. Cassini himself (in a note to his third memoir published in the Journal de Phy- 
sique for February 1816, p. 129) hae given another instance of the ramification of nerves in. 
Tva frutescens. 
T Ihave formerly observed (in Prodr. Flor. Nov. Holl. p. 580, and in General Tomais. 
on the Botany of Terra Australis) that Euthales and Velleia, genera belonging to Gooden- 
ovice, exhibit the remarkable and nearly peeuliar character of a corolla having the lower part 
of the tube cohering with the ovarium, while the calyx is entirely distinct, I have at the same 
time remarked that, even in those genera of the same natural family in which the calyx is 
coherent, the tube of the corolla may be supposed to be continued down to the base of the 
ovarium ; and that this becomes even evident in such species as have the adhering part di- 
lated into nectariferous processes; or in those where, the segments of the calyx not being 
closely approximated, the coloured corolla is visible in the interstices. In some species of 
Goodenia, particularly G. decurrens and bellidifolia, I find it practicable to separate not 
only the adhering calyx, but also the tube of the corolla from the ovarium. In the tube 
thus separated it appears that the lateral nerves, which preserve their parallelism to the 
middle nerve nearly to the base of the segment, become more evidently divergent below the 
point 
