562 
PHANEROGAMS. 
is seen in Fig. 388 ; but very commonly the margins of the carpels which turn 
in as far as the centre then split into two lamellae which are bent back and swell 
out into placentae in the middle of the loculi, as is shown in Fig. 387. It is clear 
that in this case the two placentae within each loculus correspond to the margins of 
the same carpel which forms the outer wall of the loculus. 
Fig. 386.— Gynnsceum of Saxi/i-agn cordi'foHa; A longitudinal section, style, n stigma; 5 horizontal section 
at different heights, / placenta. 
Spurious dissepiments may arise in polycarpellary as in monocarpellary ovaries; 
if the polycarpellary ovary consists of two loculi, it may thus become quadrilocular, 
or five original loculi may become divided into ten. The first case is universal in 
Labiatae and Boragineae. Fig. 390 shows that the ovary is formed of two coherent 
carpels, the margins of which {I-IV) projecting inwards form a right and a left 
placenta (//) ; on each of these placentae which correspond to the margins of the 
Fig. 387. — Gynceceuui ol I'yroui unibellata ; A longitudinal section, s sepals, i> petals, st filaments, /"ovary, n stigma, 
d nectar-glands; B horizontal section through the ovary, /"the wall, // placentas. 
carpels a posterior and an anterior ovule are produced, but an outgrowth from 
the mid-rib of the carpel {IV, VI, x) inserts itself between the two ovules be- 
longing to each loculus, dividing it into two one-seeded lobes. Since at a sub- 
sequent period the outer part of the wall of each of the four lobes bulges strongly 
outwards and upwards (B), the separation of the bicarpellary ovary into four 
separate parts becomes still more distinct ; and finally they completely separate as 
