1. Chromosome number and classification in Hydrophyllaceae

   • Lincoln Constance

   OriginalPaper Pages: 273 - 285

2. Taximetrics—New name, old concept

   • David J. Rogers

   OriginalPaper Pages: 285 - 290

3. Revision of Tragoceras (Compositae)

   • Andrew M. Torres

   OriginalPaper Pages: 290 - 302

4. Revision of Sitanion (Triticeae, Grameneae)

   • F. Douglas Wilson

   OriginalPaper Pages: 303 - 323

5. A study of Rhodophyllus types

   • L. R. Hesler

   OriginalPaper Pages: 324 - 366

6. Supplementary notes on American Labiatae VIII

   • Carl Epling
   • Carlos Játiva

   Announcement Pages: 366 - 376