MR. J. MIERS ON THE FAMILY OF TRIURIACEjE. 59 



Fig. 21 . A longitudinal section of a pistillum, with one half removed, in order to show its single erect 



ovule. 

 Fig. 22. A fruit : — of the natural size. 



Fig. 23. The same, with its persistent basal style: — much magnified. 



Fig. 24. A longitudinal section of the same, exhibiting its single seed enclosed in its fleshy pericarp. 

 Fig. 25. The seed removed, showing the particular reticulated surface of the testa. 

 Fig. 26. The same, after the removal of the testa, exhibiting the reticulated texture of the nuclear 



integuments. 

 Fig. 27. A transverse section of the same, showing the granular texture of the nucleus. 

 Fig. 28. A longitudinal section of the entire fruit, exhibiting the structure of the whole. 

 Fig. 29. A section of the fruit of Pistia obcordata, showing its single seed, enveloped by its pithy arillus, 



its apical strophiolar attachment, its testa upon a basal support, and its embryo placed in the 



summit of its albumen. 

 Fig. 30. The embryo of the same. 



i2 



