1. The taxonomic significance of an understanding of floral evolution

   • Francis W. Pennell

   OriginalPaper Pages: 301 - 308

2. Additions to the flora of sinaloa and nuevo leon

   • Howard Scott Gentry

   OriginalPaper Pages: 309 - 331

3. A name for the “alpha” variety or forma of miscellaneous dicotyledonous plants

   • Earl Edward Sherff

   OriginalPaper Pages: 332 - 342

4. Supplementary notes on the American species of strychnos—III

   • B. A. Krukoff
   • J. Monachino

   OriginalPaper Pages: 343 - 351

5. A synopsis of the tribe lepechinieae (labiatae)

   • Carl Epling

   OriginalPaper Pages: 352 - 364

6. Orthography in botanical nomenclature

   • H. W. Rickett

   OriginalPaper Pages: 365 - 368