554 Mr. MiERs on some new Brazilian Plants 



e. Pistillum, with the lower portion of the ovarium and some of the seeds 

 removed, to show the parietal placentation and mode of attachment 

 of the seeds. 



/. Ditto, with clusters of pollen-tubes escaped from the anthers pene- 

 trating the stigmata. 

 g. Capsule, with the limb of the perianthium fallen off, in the act of burst- 

 ing at the apex. 



h. Ditto, cut transversely, to show the placentation and disposition of 

 the seeds. 



i. Ditto, after dehiscence, showing the lacerated margins of the valves. 



k. Portion of the capsule, showing the longitudinal fibres of the placenta, 

 the texture of the pericarpium, and the part which by laceration forms 

 the margins of the valves. 



I. Seed, magnified. 



m. Seed, highly magnified, showing the transparent reticulated testa, 

 and the included embryo ; the upper end is that by which it is at- 

 tached to the placenta. 



w. Nucleus, showing the cord by which it is suspended from the attenu- 

 ated apex of the testa. 



o. One of the scales of the fleshy root, fringed with long ciliary hairs, 

 seen from the inside, to show the reticulated structure ; the outer 

 surface presents hairs like those of the margin. — All more or less 

 magnified. 

 Fig. 2. Dictyostega umhellata. 



a. Flower, magnified, to show the aestivation. 



h. Ditto, with the perianthium cut open, to show the stamens and pistillum. 



c. Stamen, seen in front. 



d. Ditto, seen sideways. 



e. Filament, seen in front. 

 /. Ditto, seen sideways. 



g. Pistillum, showing the three-lobed summit of the ovarium, the style 



and stigmata. 

 h. Ovarium, cut transversely, to show the placentation and disposition of 



the seeds. 



