1. Reinstatement of the genus Hymenaea (Leguminosae: Caesalpinioideae) in Africa

   • Jean H. Langenheim
   • Yin-Tse Lee

   OriginalPaper Pages: 3 - 21

2. A new Gustavia (Lecythidaceae) from Panama and Colombia

   • Thomas B. Croat
   • Scott Mori

   OriginalPaper Pages: 22 - 26

3. A new species of Camptosema (Leguminosae: Lotoideae) from the Planalto of Brazil

   • H. S. Irwin
   • Mary T. Kalin Arroyo

   OriginalPaper Pages: 27 - 29

4. New taxa in Pectis (Compositae: Pectidinae) from Mexico and the southwestern United States

   • David J. Keil

   OriginalPaper Pages: 30 - 36

5. Two new species of Besleria (Gesneriaceae) from Panama

   • Joan W. Nowicke

   OriginalPaper Pages: 37 - 41

6. Relationships of the purple-fringed orchids Platanthera Psycodes and P. grandiflora

   • Warren P. Stoutamire

   OriginalPaper Pages: 42 - 58

7. Nomenclatural changes in the Poaceae

   • Frank W. Gould

   OriginalPaper Pages: 59 - 60

8. Chromosome numbers in Heterotheca, including Chrysopsis (Compositae: Astereae), with Phylogenetic interpretations

   • Vernon L. Harms

   OriginalPaper Pages: 61 - 69

9. Monochaetum Talamancense (Melastomataceae): A new species endemic to Costa Rica

   • Frank Almeda

   OriginalPaper Pages: 70 - 73

10. A morphological and chemical study of Populus acuminata Rydberg

    • Daniel J. Crawford

    OriginalPaper Pages: 74 - 89

11. Two shrubby novelties in Eriogonum (Polygonaceae) from the deserts of Utah and Arizona

    • James L. Reveal

    OriginalPaper Pages: 90 - 94

12. Fryxellia, a new genus of North American Malvaceae

    • David M. Bates

    OriginalPaper Pages: 95 - 100