length, and those forming the stratum or circle externally bounding the wood and existing in the veins of the leaves, no essential difference in structure will I believe be found. In these points there is little resemblance between Nepenthes and Cephalotus, in the internal structure of which last there is nothing unusual.

Between the parts of fructification of Nepenthes or Cephalotus and Sarracenia, there is still less analogy, and it is obviously unnecessary to compare in this respect any of these genera with Dischidia.

September 25th, 1832.