DESCRIPTION OF THE PLATES. 



above. Fig. 4, the same seen sideways. Fig. 5, the same cut open, showing the 

 position of its extrorse stamens : all magnijied. Fig. 6, the stamens seen sideways, 

 and from their internal or dorsal face. Fig. 7, the same, seen from the external lace, 

 and sideways, before and after dehiscence : all more magnified. Fig. 8, a grain of 

 pollen: highly magnified. Fig. 9, the pistil : nat size. Fig, 10, the same : magnified. 

 Fig. 11, a longitudinal section of the same across the dissepiment, as well as of the 

 calyx. ^ Fig. 12, longitudinal section of the same, in a direction parallel with the 

 dissepiment, to show the mode of attachment of the ovules. Fig. 13, transverse section 

 of the saine : all magnified. Fig. 14, fleshy drupe : natural size. Fig. 15, its putamcn. 

 Fig.^ 16, longitudinal section of the same, showing one abortive cell and the other con- 

 taining a single seed suspended from its apical hilum. Fig. 17, the seed extracted, 

 with the thin outer coating removed, to show the distribution of the raphe, in the form of 

 a cottony web of delicate spiral threads, covering its surface, and intervening between 

 it and the more internal testa (see Linn. Trans, vol. xxii. p. 93). Fig. 18, the same 

 magnified, to show the disposition and course of these threads in' intersecting bundles, 

 all proceeding from the apical hilum. Fig, 19, the testa and inner integument witli a 

 basal chalaza, the raphe having been removed: nat. size. Fig. 20, the exalbuminous 

 embryo with its small apical radicle. Fig. 21, the radicle, separated from the large 

 fleshy cotyledons : all nat. size. 



Plate 63. 



Different analyses to show the structure of the genus Schivenhia. 



A. — Section 1. Cestranthns. 



Fig. 1, a flower of 8. grandifiora: nat. size. Fig. 2, the same : magnified. Fig. 3, 

 the same, with the segments of the corona expanded, showing the two exserted 

 stamens and style. Fig. 4, the same cut open, displaying the marginal adhesion of tlie 

 segments of the corona in aestivation, the mode of their insertion within the teeth of 

 the true border of the corolla, the two fertile and the three rudimentary stamens. 

 Fig. 5, the pistil, with half of the calyx cut away, showing the ovary seated within the 

 persistent base of the corolla, which is there circumscissile : all magnified. 



# 

 B. — Section 2. Chcetochilus. 



Fig. 1, a flower of S. Brasitiensis : nat. size. Fig. 2, the upper portion of the corolla, 

 showing the narrow elongated segments of the true border of the corolla, which are 

 valvate in aestivation : the corona is here reduced to tlie size of five small teeth, which 

 are also valvate in aestivation. Fig. 3, the same with the segments of the border and 

 corona opened. Fig. 4, the same cut open, to show^ the position of the two fertile and 

 three rudimentary stamens : all magnified. Fig. 5, the capsule in its persistent calyx. 

 Fig. 6, the capsule removed. Fig, 7, the same burst open, showing the dissepiment : 

 all nat. size. Fig. 8, the capsule. Fig. 9, a transverse section of the same. Fig. 10, 

 the capsule with the valves fuUy opened, showing the position of the seeds upon the ' 

 dissepmient. Fig. 11, the dissepiment with the placenta in the middle. Fig. 12, the 

 same seen edgeways, showing the attachment of the seeds. Fig. 13, the seeds : all some- 

 what magnified. Fig. 14, a seed. Fig- 15, the same, with half of its testa removed. 

 Fig. 16, a longitudinal section of the albumen, with the embryo imbedded in it. 



agnified- 



c 



