DESCRIPTION OF THE PLATES. 
Fig. 18, a transverse section. Fig. 19, two seeds from one cell; all nat. size. Fig. 20, 
a seed, shown sidewise. Fig. 21, the same, seen on the dorsal side. Fig. 22, the 
same, with half of the external covering (ariUme) removed, to show the intermediate 
osseous coating (testa). Fig. 23, a transverse section of a seed. Fig. 24, the osseous 
testa, with the raphe and chalaza (which has a cavity) in the base. Fig. 25, a longi- 
tudinal section of the same, with the albumen and inner integument removed, showing 
the hollow space in the thick basal chalaza in which the raphe terminates. Fig. 26, 
the third or inner integument of the seed. Fig. 27, a longitudinal section of the albu- 
men, enclosing the embryo. Figs. 28 ife 29, the embryo, seen on one face and edge- 
wise ; all magnified on the same scale. 
Plate 81. — Vallea pubescens. 
Fig. 1, a flower in bud. Fig. 2, the same, expanded. Fg. 3, a petal. Fig. 4, a sta- 
men. Fig. 5, the pistil : all nat. size. Fig. 6, a sepal. Fig. 7, a petal. Fig. 8, a sta- 
men. Fig. 9, the pistil, seated on the disk within the calyx. Fig. 10, a longitudinal 
section of the ovary and disk, showing the insertion of the stamens round the middle of 
the disk : all magnified. Fig. 11, a fruit, nat. size. Fig. 12, a longitudinal section of 
the same, showing the membranaceous epicarp corrugated into many obtuse tubercles 
replete A\nth the fleshy mesocarp ; also denoting the mode of attachment of the seeds. 
Fig. 13, a transverse section of the same : hath magnified. 
Plate 82. — Tricuspidaeia Patagua. 
Fig. 1, the calyx, in bud. Fig. 2, the same, after the expansion of the flower. Fig. 3, 
the same, seen from below. Fig. 4, a petal, on its inner face. Fig. 5, the same, seen 
externally. Fig. 6, a flower with the petals removed, to show the insertion of the sta- 
mens on the disk. Fig. 7, three of the stamens. Fig. 8, the pistil seated on the disk : 
all nat. size. Fig. 9, a longitudinal section of the ovary, together with the mode of in- 
sertion of the stamens upon the disk, magnified. Fig. 10, a fruit in dehiscence, seen 
from above. Fig. 11, the same, with some of the seeds removed, showing its loculicidal 
dehiscence, the dissepiments remaining attached along the middle of the valves. Fig. 12, 
a seed: all nat. size. Fig. 13, a seed, magnified. Fig. 14, a transverse section of the 
same, showing the external fleshy covering, the intermediate osseous coating, the inner 
thin integument, the albumen and embryo. Fig. 15, the seed, with half of its fleshy 
external covering removed, showing the intermediate osseous coating, with its large trun- 
cated basal chalaza. Fig. 16, the osseous coating, showing the Hne of raphe in front. 
Fig. 17, the same, seen sideways. Fig. 18, a longitudinal section of the osseous coating, 
showing the hollow space within the very thick chalaza. Fig. 19, the albumen extracted, 
covered by the thin inner integument. Fg. 20, a longitudinal section of the same. 
Fig. 21, the embryo extracted, seen on its face. Fig. 22, the same, seen edgewise : all 
magnified on the same scale. 
Plate 83. 
A. Portion of a branch of Ckinodendeon Hookeeianum. 
Fig. 1, a flower. Fig. 2, the calyx. Fig. 3, a petal, seen behind and before. Fig. 4, 
the pistil, seated on the disk and calyx, with one of the stamens, to show the place of 
their insertion : all nat. size. Fig. 5, a stamen, seen in front and sidewise. Fig. 6, a 
longitudinal section of the ovary seated on the disk : both magnified. Fig. 7, the unripe 
fruit, as observed by Sir Wm. Hooker, nat. size. 
