182 REV. PROF. G. HENSLOW ON THE 
centre. At the summit of the inferior ovary, the central or 
placental cords send off three branches, respectively—one to each 
ovule, and two to join the nearest cords (4). 
xxx. Daucus Carora.—tThe diagram represents a section taken 
at the summit of the ovary, and illustrates the fusion of two 
cords on either side of each ovary-cell; so that the section 
(through the swollen bases of the styles, which form the so- 
called epigynous disk) shows only three, instead of five, cords in 
each mericarp. 
As in the Geraniaceæ, the carpophore consists of the united 
marginal cords of the two carpels, so that it contains no part of 
the axis whatever. 
It is worth while observing that of the two cords situated one 
at each end of the long axis, 7. e. dorsal cords of the ovarles, one 
divides and supplies a sepal with its cord, the other also divides 
but supplies a petal. 
XVI. ARALIACE E (PI. XXVIII.).—xxxr. HEDERA HELIN. 
—The pedicel at first contains four cords (1). These increase till 
a complete ring consisting of ten cords is formed at the taper- 
ing base of the inferior ovary (2-5). These ten become fifteen 
(6) and then twenty (7), and are arranged in concentrie circles. 
The outermost consists of ten, the other two of five cords each. 
The outermost cords supply the sepals and petals ; the next, the 
stamens which are opposite to the sepals. The innermost are 
carpellary and opposite the petals. The number of ovary-cells 
varies from three to five. When there are three, the carpellary 
cords first approximate to form two pairs, leaving one free. 
They are finally reduced to three. They then become double in 
number (8), and while one cord passes to each ovule, the re- 
mainder pass up the style (9) *. 
XVII. CAPRIFOLIACE;E (Pl. XXVIIL).—xxxrm. Lont- 
CERA PERICLYMENUM.— The pedicel has a somewhat disconnected 
circle of cords enclosed in a definite pericycle indieated by a 
zone in the figure (1). The circle gives off ten cords (2). Five 
of these belong to the sepals, while the other five, becoming 
double, pass into the corolla-tube (3, 4); three being isolated in 
the middle as placentary (4). Of the ten cords in the corolla- 
* For further observations on the structure of the flower of the Ivy, I would 
refer the reader to ‘ The Origin of Floral Structures,’ p. 67 seqq. fig. 14. 
