Dr. Corr EA on two Genera ef Plants, Be. : 219 
ways acknowledged. as ftriétly natural. To the fagacity and pro- 
found fcience of Juffieu we are of late indebted for the conftant and 
almoft exclufive characters which diftinguith this family, and cir- , 
cumf{cribe its affinities. He remarked, that the feeds in this natu- 
ral order contain a crooked embryo without perifperm; that their 
placentation is always parietal, in a fruit which in confequence 
muft be moftly unilocular *. 
The Crateva marmelos of Linné, and the Crateva anni of Konig; 
I have obferved i in the herbarium of the Right Hon. Sir Jofeph 
Banks, and I have received the fruits of both from him. Upon ex- 
amining the fruits I have found that their feeds contain a ftraight 
embryo with a fmall radicula, and flefhy, large, plano-convex coty- 
ledons ; and that their placentation is central, in a multilocular 
fruit; they. cannot therefore be fpecies of Crateva. The further 
. examination of the other parts of their fructification confirms this 
firft opinion, and, fhewing how far they differ from the Crateva in 
other important points, gives us a clue to find their proper place in 
the natural fyftem. sonc 
. But. before lL. proceed to the defcription. of the fructification -^ 
thefe two plants, as I intend to deviate in fome manner from the 
common method of defcribing, I muft give the reafons which per- 
{uade me of the utility and perhaps neceffity of the alterations 1 
adopt, and fhow that fingularity, or fpirit of innovation, are not my 
motives, but that the prefent ftate of {cience requires, in fome man- 
ner, this change of method. 
.. Of the fix divifions i in the Linnzan method of defcribing genera, 
four relate to the flower, and exift at the fame period, viz. the calyx, 
coroll, ftamina, and piftill; the other two exift after the decay of 
the jr viz. the REMAP and the feed. "They; are. the off- 
Fufieu Gen. PI 2- 246. dn) ; 
F f 2 | | fpring 
