STRUCTURE OF ORANGE. 47 
sides, and appear as a single body, as in the Mallow 
(f. 4.), Lily (£. 8.), Evening Primrose, Foxglove, &e. 
but by cutting such a body across, it will be seen to be 
composed of a number of cells, separated by as many 
partitions, or septa as they are called; these partitions 
are the sides of the ovaries united: in many instances 
they may be separated into two layers, proving that 
each cell is composed of an ovary. 
An Orange (f. 10.) cut across shows on a large scale 
the arrangement of several ovaries; in the middle is 
seen a white centre, with a number of partitions (p.) 
passing outwards to the rind or peel, and the pips or 
seeds will be found lodged at the narrow end of these 
divisions. (The pulp of the orange is peculiar to the 
fruit, and has nothing to do with the arrangement of 
the different parts.) When the peel is taken off, the 
soft bulk of the orange can be easily separated into 
portions varying from eight to ten; each portion is an 
ovary (f. 11.), (but when in a ripe state is called a 
carpel,) and is united by its sides to two others, forming 
altogether a compound ovary: the placentas, or seed- 
bearing parts are the narrow edges of these carpels, 
which occupy the centre of the fruit; the partitions 
in the cut orange appear to be single, but are, in fact, 
double, just as they are in other compound ovaries. 
70. But partitions do not exist in every instance in 
which carpels are united together; as for example, in 
the Pink (f. 9.), Sweet William, and Primrose, in 
which it is supposed two or more ovaries have been 
united, but which have not produced their sides, and 
consequently no ‘partitions are to be found in them. 
