DESCRIPTION OF, THE PLATES. 267 
ovary, much magnified. Fig. 8, a fruit in a very young undeveloped state within the calyx and 
on the peduncle. Fig. 9, a transverse section of the same. Fig. 10, a ripe fruit of Thevetia Ahouai 
supported by the calyx and pedicel. Fig. 11, the osseous endocarp of the same, with the short 
apical longitudinal slit. Fig. 12, a side view of the same, showing the apical transverse open slit 
continued along the marginal edges. Fig. 13, half the same, made by a knife passed through the long 
slit and separating the two lamellar plates of the placenta, one of which is seen showing the bundle 
of nourishing vessels rising from the base and divided into two branches, the vessels penetrating and 
passing through the placenta to be lost in the seed of each cell. Fig. 14, the nut is divided by a 
short transverse dissepiment, from the middle of which, to the right and left, branch off two placentas 
nearly dividing it into two, a seed being peltately attached to each branch, thus making four pseudo- 
cells, each one-seeded. Fig. 15, one of the fleshy seeds, showing the peltate hilum of attachment. 
Fig. 16, the same, seen on its edge, showing the hilum. Fig. 17 shows the radiating bundles of 
spiral vessels about the hilum. Fig. 18, the exalbuminous embryo, with thick fleshy cotyledons 
and the oblique short superior radicle. Fig. 19, the same, shown on its edge: all natural size. 
B. Condylocarpum gracile, a portion of a pendent branch, with its opposite axillary branching panicles. 
Fig. 1, a flower. Fig. 2, the same expanded: both natural size. Fig. 3, a flower in bud, mag- 
nified. Fig. 4, the corolla cut open, to show the peculiar form of the segments, their sinistrorse 
convolution, and the position of the stamens near the base of the tube. Fig. 5, a segment of the 
corolla: more magnified. Fig. 6, a stamen, much magnified. Fig. 7, the calyx with the sepals 
thrown back, showing its membranaceous margins dotted with many red spots, the two ovaries, very 
short style, capitate hairy clavuncle, and stigmata. Fig. 8, one of the segments of the lomentaceous 
follicles, which contains two superposed seeds. Fig. 9, another, which contains only a single seed. 
Fig. 10, transverse section of one of these segments, showing the broad margins filled with pith, its 
single cell divided nearly into two by a longitudinal septiform placenta, with a nucleus attached to 
its margin by a central hilum and coiled round it: all natural size. Fig. 11, a seed with its 
margins coiled inwards to embrace the placenta, showing the hilar point of its attachment. Fig. 12, 
the same with its margins flattened out. Fig. 13, the heterotropous embryo imbedded in thin 
albumen, showing the thin foliaceous oblong cotyledons, and the superior thin terete radicle, of 
one third their length: all somewhat magnified. _ 
Pirate V. 
A. Manothrix valida, a portion of the plant in fruit. Fig. 1, the 2-celled capsule dehiscing along 
the dissepiment, each half splitting along the line of the axis at the suture, whose margins are 
inflexed and combined into a narrow cylindrical placenta bearing many hairy seeds. Fig. 2,a me 
verse section of the capsule, showing the divisible dissepiment, the inflexed margins of us ens 
niferous placentas. Fig. 3, a seed: all natural size. Fig. 4, a seed, seen on its dorsal side, where 
it is pilose above the middle with long soft hairs. Fig. 5, the same, showing its ventral face, 
marked by a central hilum, by which it is peltately affixed to the placenta. Fig. 6, the copious 
albumen extracted. Fig. 7, the heterotropous embryo: all much magnified. Fig. 8, portion of one 
of the remarkable hairs, seen under a microscope of great power, and marked by a dark capillary axis 
with many alternate horizontal lines, the intervening spaces ornamented by close spiral lines. 
B. Manothriz nodosa, portion of a plant, showing its opposite leaves and nodose joints at the remote 
axils and its short axillary raceme. Fig. 1, a flower, natural size. Fig. 2, the — vin open, 
to show the dextrorse convolution and the position of the stamens, a little magnified. Fig. 3, the 
same, showing the tube of the corolla pubescent inside, more magnified. Fig. 4, stamens, shown in 
different positions, still more magnified. Fig. 5, the calyx, pedicel, and long slender style, the 
clavnncle and short terminal stigmata, much magnified. 
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