118 
If 
18. 
19. 
20. 
Fig. 1. 
18. 
MR. J. MIERS ON THE BARRINGTONIACE Л. 
Тһе cup-shaped calyx, with a truncated margin : all nat. size. 
The monadelphous tube of the stamens, cut open, to show the inner row of short sterile filaments, 
the whole having fallen from the inner margin of the disk. 
А longitudinal section of the ovary, crowned by the calyx, disk, and style. 
A transverse section of the same, showing it to have only 2 cells: the last three figures are some- 
what magnified. 
Puate XVIII. 
A portion of the flowering specimen of Planchonia crenata, from Mr. Robert Brown’s typical 
specimen in the British Museum; the branching panicle shows a flower in bud and another 
fully expanded. 
. The stamens united into a monadelphous tube, upon which one of the four petals remains, to 
show how they are agglutinated to it by their claws, the tube having fallen from its attach- 
ment to the outer margin of the disk. 
. The ovary, surmounted by the sepals and style. 
. A longitudinal section of the same, showing two of its four cells, and surmounted by the stili; 
disk, and style. 
. A transverse section of the same, showing its 4 cells. 
. The drupe, drawn from Mr. Brown's specimen. 
A longitudinal section of the same, crowned by the persistent sepals, disk, and style, and showing 
| two of the four clls, with the seeds as they exist in situ, the pulp being removed. 
. А longitudinal section of another fruit, collected by Schomburgk ; this is gibbous, owing to the 
abortion of three of its cells, and it contains 4 seeds, horizontally attached to the axis, and 
apparently once imbedded in pulp, as in the preceding specimen. 
. One of the seeds, on its short thick funicle. 
. The same, deprived of its membranaceous integument and funicle, showing a depressed hollow on 
one side below the apex: seen on its face. 
. The same, viewed on its edge. 
. A longitudinal section of the same, seen from the interior of one of the faces, from which the 
loose embryo has been removed : it is an envelope of thick firm texture, opaquely white, seeming 
like an albumen. 
. The embryo extracted: all nat. size. 
. The same, magnified, showing the thick subtruncated terete radicle, upturned suddenly near the 
base, and supporting the two roundish fleshy subplicated cotyledons. 
. An edge view of the same: equally magnified. 
. А portion of a plant of Petersia africana, from a specimen given to me by Dr. Welwitsch. 
. А flower on Из pedicel. 
The ovary and calyx, the petals and stamens having been removed: all nat. size. 
19 is an enlarged view of fig. 17, showing its 4-winged inferior ovary, crowned by the 4 eL init alternate 
30. 
21. 
Ап anther, seen before and behind : more magnified. 
93. 
25. 
26. 
with the wings and the 4 petals. 
A longitudinal section of the ovary, disk, and style. 
А transverse section of fig. 20. 
The monadelphous stamens detached from the outer margin of the disk: all magnified. 
- A fruit, with its 4 large membranaceous wings. 
The pericarp of the same, deprived of its wings. 
A buxo section of the same: all nat. size. 
