186 REV. PROF. G. HENSLOW ON THE 
staminal, half a petaline, and a dorsal carpellary cord, all arise 
from one and the same common stem *. 
XXI. CAMPANULACE (PI. XXIX.).—xxxIX. JASIONE 
MONTANA.— The pedicel contains about ten cords (1). These mul- 
tiply and send off as many as there are bracts to the small involuere 
(2). Branches come up to the surface of the general receptacle, 
as in Composite, for the florets (3). Each floret has five sepaline 
and two dorsal-carpellary derived from them. The five sepaline, 
on reaching the top of the ovary, send off horizontal branches, 
which form a complete ring around the base of the lobes (6). 
The same feature oceurs in Campanula rotundifolia: from the 
middle point, where the two adjacent branches meet, the petaline 
cord issues (4, 6, p.); so that the petals are supplied with their 
median cords, exactly in the same way as the stipules of Galium 
are with their midribs. Figure 5 shows a dorsal carpellary cord 
(d.c.) springing from a sepaline (2). 
XXII. ERICACEE (Pl. XXIX.).—xr. ERICA CINEREA has a 
complete ring of cords in the pedicel (1). This sends oft two 
pairs of cords for the sepals (2, 3). The number supplied to the 
corolla varies from eight to ten or twelve by the branching of one 
or more (4, 5). Hight are given off to the stamens, four of which 
stand in front of and four alternate with the petal-lobes (6, st.) 
Then follows the eight-lobed disk (D) formed from a swelling at 
the base of the pistil. Eight large cords alternate with the 
stamens (6). These tend to coalesce (7), and re-form into four 
large and four smaller cords (8). The latter soon pass outwards 
below the ovary-cells (ov.) t, and come up as dorsal carpellary 
(9, d.c.). "The others are placentary (9, pl.). Ph. van Tieghem 
lays stress on the fact that these latter are oriented inwards, and 
therefore are axial. Since, however, the dorsal cords are already 
provided, it is clear that the group of eight is (8) potentially 
carpellary, though the ovary-cell are still wanting +. The point, 
therefcre, where the axis ceases to exist is between the levels 
represented by figures 7 and 8; that is, immediately above the 
insertion of the stamens, and no part of the axis enters the 
* A further description of the distribution of the cords of this species will be 
found in * The Origin of Floral Structures,’ pp. 43 and 71. See also Ph. van 
Tieghem's work, /. c. p. 73, pl. xii. figs. 67-73, 
t The position of the future ovary-cells is 
indicated by four dotted rings 
(8, ot.). 
