16 DEVELOPMENT OF THE FLOWER 
For it appears highly probable, that an organ formed 
by the union of two distinct limbs should have exactly the 
same venation as an organ formed of simple origin, and still 
more that the composition should allow such a degree of 
imitation of a leaf, as to admit of the structure of a petiole. 
Trewia has the male flowers and habits of Euphorbiacee, 
such as Croton: it also tends hither by its occasionally 
having 3 carpella. 
It has the calyx perhaps of Urticeæ, and certainly the 
stigmata, but all Urticee have simple carpella ; so has Trewia 
sometimes, its Fabi ovary has been seen by others, 
as well as myself. 
In the nature of the ovarium, in the fungoid production 
of the placenta, and the ovulum generally, it approaches 
Euphorbiacez and Scepacee. 
In two instances the additional fémálé flower has been 
reduced to a stalk bilobed at its apex, each lobe having its 
two stigmatic lines, and consequently it is to be inferred that 
the ovarium would have been binary, two vascular fascicles 
in the stalk, one to each style. 
As in this case there was no cavity. whatever, while the 
stigmata were tolerably well developed, it is adducible as a 
proof of the greater permanence of the style and stigma to 
the other parts of a carpellary leaf. 
In another instance the female was more developed, con- 
sisting of a solitary carpellum, the stigma and style were 
well developed, but there was an apparent tendency to 
openness of the ovarium, as if one margin bad been inflect- 
ed, the other lapping over it, such as would result from 
making an ovarium from a leaf with the ordinary venation. 
It is obvious from the situation of these additional ovaries, 
that they belong to a different flower from the more de- 
veloped one. Did they belong to the same flower, the suture 
woüld have the same direction with the stigmatic furrows of 
the perfect flowers ; whereas, it is just the contrary. 

