Oliver . — On Save odes sanguined , Torr . 319 
it is seen that the wall of the ovary is thickened at points 
corresponding to the nectariferous areas. The arrangement 
of the nectaries in the different genera of Monotropeae is a 
matter of much interest. Thus, in Monotropa glabra (Fig. 22), 
each lobe of the ovary is produced downwards into a small 
appendix, the nectary n. These appendices curve in pairs, 
embracing the antipetalous stamens, and drop their nectar 
into the gibbosities of the petals. This is shown in Fig. 22, 
the petalline stamens (p s) in each case being thus embraced. 
The petal (/) shown in the figure receives the nectar from 
glands surrounding the stamen p s 2 . The other petals have been 
removed, but their scars do not show since their insertion is 
so close up under the stamens : s s are the basal portions of 
the sepals which stand in a very loose spiral. Other genera, 
likewise, afford most interesting details, but a special account 
of these structures in other members of the order is deferred 
to a future paper. 
The ovary itself is 5 -carpellary, each carpel being bilobed 
(cf. Fig. 21, //, a transverse section taken midway between the 
base of the ovary and the insertion of the style). The figure 
shows the five septa and the enormously developed axis, with 
a bilobed placenta projecting into each ‘cell’ of the ovary. 
The lobing of the ovary wall corresponds entirely to the lobing 
of the placentas. In this type the transition, from parietal to 
axile placentation, is well shown, and is illustrated in the series 
of transverse sections, Fig. 21, A-H. A is through the stigma, 
and the inwardly projecting lobes appear lower down as the 
ovarian dissepiments ; B is across the style, and shows the 
‘ style-canal ’ ; C is through the insertion of the style on the top 
of the ovary, and shows the enlarging lobes. In 21 i? the 
region where ovules are borne has been reached. In E the 
placentas are much enlarged and the central cavity corre- 
spondingly diminished ; in F this is carried till finally in G 
there is absolute fusion of the placentas, and, in the greater 
part of the ovary, the lines of fusion are indicated by the 
median groove in each of the five placentas (Fig. 21, H). 
This series of sections shows sufficiently clearly that in the 
Y 
