( 329) 
three ovules are borne on each lobe of the placenta, making 
about twelve or fifteen in each ovary. 
Melothrieae 
The pistillate flower of Melothrza arises as a lateral out- 
growth similar to that of Fevzélea. It is at first rounded at 
the apex, but soon becomes flattened and concave. About as 
soon as the depression becomes distinctly discernable, five 
lobes appear upon its border, and these increase rapidly in 
size and soon overtop the concavity. By this time there have 
arisen, alternately with these lobes, five others on the inside 
of the cup and just below the insertion of the outer circle. 
(fg. 1, C). This figure also shows the beginning of the stami- 
nodia which here appear as slight elevations below the second 
circle of protuberances. The placentae appear in figure z, D. 
Up to this time, and much later, in fact, there is little or no 
growth of the central tissue of the axis. After the first circle 
of lobes appears there is an increase in the growth of the 
outer tissue, which becomes often clearly marked off from 
the more central tissue by reason of its larger cells. The 
growth of this outer layer carries up with it the younger 
lobes so that they appear later to be an outgrowth of its inner 
surface. The most rapid zone of growth is just below the 
second circle of lobes or the corolla-lobes, so that the calyx 
and corolla soon become lifted above the young placental 
lobes. Later another zone of elongation is to be seen below 
the first placental lobes, so that the latter become consider- 
ably removed from the bottom of the cup, and finally grow 
up into the style and stigma. The first series of lobes formed 
gives rise to the calyx. 
After elongation in the second zone has proceeded for 
some time the longitudinal ridges of the placentae appear, 
three in number reaching to the bottom of the cup. These 
grow in toward the center, become later angular by reason 
of mutual pressure and each bears two rows of ovules, which 
finally assume an anatropous position with the micropyle di- 
rectly toward the wall of the ovary. 
