1. Letters and Comments

   • Eric Boa
   • R. C. Srivastava

   Letter Pages: 2 - 2

2. News & Notes

   News Pages: 3 - 3

3. Plant Portraits

   OriginalPaper Pages: 4 - 6

4. Homeotic Sexual Translocations and the Origin of Maize (Zea Mays, Poaceae): A New look at an old problem

   • Hugh H. Iltis

   OriginalPaper Pages: 7 - 42

5. Isozymatic and Morphological Diversity in the Races of Maize of Mexico

   • J. J. Sanchez G.
   • M. M. Goodman
   • C. W. Stuber

   OriginalPaper Pages: 43 - 59

6. A Regional analysis of Maize Biological Diversity in Southeastern Guanajuato, MéXico

   • José Alfonso Aguirre GóMez
   • Mauricio R. Bellon
   • Melinda Smale

   OriginalPaper Pages: 60 - 72

7. Zapotec and Mixe use of Tropical Habitats for securing medicinal plants in MéXico

   • B. Frei
   • O. Sticher
   • M. Heinrich

   OriginalPaper Pages: 73 - 81

8. Use and management of Totora (Schoenoplectus Californicus, Cyperaceae) in Ecuador

   • Manuel J. MacÍa
   • Henrik Balslev

   OriginalPaper Pages: 82 - 89

9. Introduced plants in the indigenous Pharmacopoeia of Northern South America

   • Bradley C. Bennett
   • Ghillean T. Prance

   OriginalPaper Pages: 90 - 102

10. Pecan food potential in prehistoric North America

    • Grant D. Hal

    OriginalPaper Pages: 103 - 112

11. Notes on economic plants

    BriefCommunication Pages: 113 - 114

12. The search for “Kaladana” (Ipomoea, Convolvulaceae)

    • Daniel F. Austin

    Notes on Economic Plants Pages: 114 - 118

13. Book reviews

    • Daniel F. Austin
    • Eckart Elch
    • Maurizio G. Paoletti

    BookReview Pages: 119 - 132