32 Mr. Brown, on the Proteaceae of Jussieu. 
cautiously used in the generic characters of this family ; even its 
being sessile or pedicellated is not always of sufficient import- 
ance, though I think Mr. Salisbury has done well in introducing 
it into his characters of Serruria and Spatalla, in both which 
genera I had overlooked it before the publication of his Essay. 
Its internal structure, which ought always to be ascertained, 
will be found of the greatest importance in most cases, but fails 
in Persoonia, the species of which differ in having one or two 
seeds: it would seem however, in this case, that an irregularity 
in a point of such importance could not take place unaccom- 
panied with other anomalies in the same organ, and accordingly 
such are found to exist in this genus, and will be mentioned 
whettreating of the fruit./ mature is | 
. Besides number, the insertion of die ovela ds. T to bie at- 
tended to; for though this may generally be presumed trom the 
situation of the radicula in the ripe seed, yet to this criterion 
there are several exceptions, even in the present order: thus, 
while the radicula constantly points downward in the whole of 
the order, the insertion of the ovulum is in many cases at the top 
or side of the cell of the ovarium. My observations on this sub- 
ject are as yet ‘incomplete ; ; but, from those that I have made, I 
am inclined to think such differences will be connected with 
genera, or rather perhaps with particular kinds of fruit. Thus 
I conjecture, in Leucospermum, Mimetes, a and antes, 
the insertion to be uniformly lateral. - wy feiss 
The sTyLe, though not subject to nh pacem this family, 
wil be found in a few cases to furnish generic characters. 
‘Thus in Protea, strictly so called, the. persistent subulate style 
forms an important part of its character: and the persistency of 
the whole of the style in the greater number of species of Gre- 
s nitie will — be used u future botanists.in. distinguishing 
aue x :,4hem 
