272 DESCEIPTION OP THE PLATES. 



Plate XVI. 



Odmtadenia grandiflora, a portion of a plant in flower, from Hayes's specimen. Fig. 1, the lower ven- 

 tricose part of the coroUa, opened to show the insertion of the stamens included in it. Fig. 3, stamens 

 with the anthers cohering in a cone : both natural size. Fig. 3, a stamen, seen in front, the fila- 

 ment inserted in a tuft of hairs, much magnified. Fig. 4, the same, on the dorsal side, where it is 

 pilose. Fig. 5, the unequal sepals thrown back to show the broad inner scales, the 5-cleft disk, and 

 the ovaries. Fig. 6, the two ovaries surrounded by the disk, the style, clavuncle, and stigmata. 

 Fig. 7, the follicle, from Smith's specimen. Fig. 8, a transverse section of the same, to show the mode 

 of placentation. Fig. 9, portion of the submembranaceous placenta, seen on the side facing the 

 pericarp, studded with the cicatrices on which the seeds are imbricately seated. Fig. 10, one of the 

 terete erect seeds. Fig. 11, a longitudinal section of the same seed, showing the anatropous seed 

 enclosed in it. Fig. 13, the embryo embedded in albumen. Fig. 13, the embryo extracted, with the 

 short basal radicle : all natural size. 



Plate XVII. 



Macrosiphonia prostrata, a plant in flower and in fruit. Fig. 1, the corolla cut open, showing the 

 position of the cohering stamens. Fig. 2, a stamen detached : both natural size. Fig. 3, the 

 same, seen in front and sideways, magnified. Fig. 4, the calyx, with the lanceolate sepals thrown 

 back to show the row of many minute ianer scales, the disk of five erect lobes surroundiag 

 the much longer ovaries, the very elongated slender style, the clavuncle extricated from the cohering 

 anthers, and the stigmata. Fig. 5, the two subtorose, suberect foUicles. Fig. 6, a seed, seen before 

 and behind. Fig. 7, the nucleus.. Fig. 8, the anatropous embryo extracted from the corneous 

 albumen of the nucleus : all natural size. 



Plate XVIII. 



Stipecom,a pulchra, a portion of the plant, showing its opposite deeply peltate leaves, and its opposite 

 axillary panicles on a stout recurved peduncle, charged at its base with large leaf-like bracts, and 

 branching above, with somewhat distant branchlets, each with several large foliaceous imbricated 

 petiolate bracts, the upper ones having in their axils a single flower on a pedicel, bibracteolate, aU 

 densely tomentose. Fig. 1, a flower on its bibracteolate pedicel, the corolla in bud. Fig. 2, the 

 corolla expanded. Fig. 3, the same cut open, to show the dextrorse contortion of the segments and 

 the position of the stamens. Fig. 4, the calyx, with the sepals thrown back to show the few minute 

 basal scales, the 5-cleft disk, the ovaries, style, and clavuncle : all natural size. Fig. 5, a stamen. 

 Fig. 6, the style, clavuncle, and stigmata : both magnified. Fig. 7, the disk and ovaries, more magnified. 



Plate XIX, 



Stipecoma ovata, portion of a plant in fruit. Fig. 1, the two erect follicles conjoined at the apex, one 

 of them gaping open, dehiscing along the ventral suture, and showing in the centre the tubular sub- 

 membranaceous placenta, charged inside with numerous imbricate seeds . Fig. 2, a transverse section of 

 the follicle beginning to dehisce, with the placenta separating at the keel from the sutural margins. 

 Fig. 3, a transverse section of the placenta, showing the keel separated from the said margins, free from 

 the pericarp on the dorsal side : all natural size. Fig. 4, a portion of the submembranaceous placenta, 

 viewed from the inside, showing the many slender parallel ribs, resolved at distant intervals into a small 

 cone-shaped appendage open at the bottom and concealing the funicle of a seed attached at its apex. 



