DESCRIPTION OF THE PLATES. 
in as many incomplete cells, formed by the rudimentary dissepiments. Fig. 11, a trans- 
verse section of the same, showing the same parts : all greatly magnified. Fig. 12, stellate 
hairs covering the petals and calyx. 
Plate 30. — A. Steigelia naivis, in flower. 
Fig. 1, a flower. Fig. 2, the coroUa cut open, showing the position of the stamens. 
Fig. 3, a petal. Fig. 4, a stamen. Fig. 5, the pistil : all not. size. Fig. 6, two of the 
petals, showing their valvate mode of aestivation. Fig. 7, stamens seen in difierent posi- 
tions ; the two anther-ceUs, separated hy a distinct interval, are nearly the width of the 
filaments, which are conspicuously broader, the cells being dorsaUy attached hy their entire 
length. Fig. 8, transverse sections of the same across the anthers, before and after dehis- 
cence. Fig. 9, poUen-grains. Fig. 10, the ovary seated on the torus, with the tube of 
the calyx removed. Fig. 11, longitudinal section of the same : all magnified. Fig. 12, 
the same, more magnified, showing its unilocular cell, with the elevated central placenta, 
the three incomplete dissepiments, and the ovules attached to the placenta in three series ; 
the summit of the cell is depressed and much thickened, as shown in Styrax Porterianum 
(Plate 29 c). Fig. 13, a transverse section of the same, showing the same parts ; the glan- 
dular processes of the placenta are here shown, in the middle of which the ovules are at- 
tached. Fig. 14, a longitudinal section of the same, with the ovules removed, showing 
more distinctly the central free placenta, with the incomplete dissepiments. Fig. 15, the 
placenta removed, showing the three series of ovules. Fig. 16, a longitudinal section of 
the placenta, showing the mode of attachment of the ovules. Fig. 17, the stigma, and 
portion of the style : all more or less highly magnified. 
B. Steigelia l^vis, in fruit. 
Fig. 18, the ripe drupe enclosed in the persistent calyx. Fig. 19, the same, with the 
calyx removed. Fig. 20, the corneous shell of the endocarp with its ornamental spots and 
the lines of the shrivelled incomplete dissepiments. Fig. 21, the seed attached to the 
torus, with the pericarp and calyx removed. Fig. 22, the same, showing the scar left by 
the breaking of the base of the osseous testa. Fig. 23, the seed, with the integuments 
covered by the araneiform network of the branching raphe. Fig. 24, the albumen. 
Fig. 25, longitudinal section of the same, with the enclosed embryo. Fig. 26, the embryo 
extracted, seen in front and edgeways : all nat. size. Fig. 27, portion of the osseous testa, 
where it breaks away from its persistent base, showing the scar with the raphigerous aper- 
ture on one side : the corresponding part of this channel is seen in the lower detached 
portion of the shell ; and beneath this again are found the abortive ovules, stiU attached to 
the original placenta, a single ovule only having been fertilized and grown to maturity : 
the intermediate cup which bears the abortive ovules is therefore a portion of the pericar- 
pal covering, the lower cup being part of the calyx. Fig. 28, a longitudinal section of a 
portion of the osseous testa, showing the channel through which the raphe proceeds from 
the placenta, at first as a simple cord, which by degrees becomes subdivided into innumerable 
ramifications, forming at length a dense cottony web of white spiral threads distributed 
over the inner surface of the testa : both magnified. 
Plate 31. — A. Details of Halesia teteapteea. 
Fig. 1, a flower in bud, showing the very imbricated aestivation of the coroUa, as in 
Styrax. Fig. 2, the same expanded. Fig. 3, the corolla cut open, showing the position 
