1. Four new species of Erythroxylum (Erythroxylaceae) from northeastern Brazil

   • Timothy Plowman

   OriginalPaper Pages: 189 - 200

2. Seed morphology under SEM and light microscopy in Kansas Juncus (Juncaceae)

   • Ralph E. Brooks
   • Carol Kuhn

   OriginalPaper Pages: 201 - 209

3. Two new species of Rhynchospora (Cyperaceae) from Mexico

   • Robert Kral
   • Wm. Wayt Thomas

   OriginalPaper Pages: 210 - 215

4. Book reviews

   • Julie Sloan Denslow
   • Lois Brako

   BookReview Pages: 215 - 216

5. Nomenclatural changes in Polygonum section Echinocaulon (Polygonaceae)

   • Chong-wook Park

   OriginalPaper Pages: 217 - 219

6. Economic Botany: Plants in Our World. By Beryl B. Simpson and Molly Conner-Ogorzaly

   • Ghillean T. Prance

   Book Review Pages: 219 - 219

7. A new species of Peperomia (Piperaceae) from Venezuela

   • Julian A. Steyermark

   BriefCommunication Pages: 220 - 221

8. A contribution to the taxonomy of Piptadenia (Mimosaceae) in South America

   • Rupert C. Barneby

   OriginalPaper Pages: 222 - 229

9. Biology. By Peter H. Raven and George B. Johnson

   • Scott A. Mori

   Book Review Pages: 229 - 229

10. A new Mecranium (Melastomataceae) from Hispaniola

    • James D. Skean
    • Walter S. Judd

    OriginalPaper Pages: 230 - 237

11. Books received

    Announcement Pages: 237 - 237

12. Taxonomic placement of Calycogonium squamulosum (Melastomataceae: Miconieae)

    • Walter S. Judd

    OriginalPaper Pages: 238 - 242

13. A Flora of San Diego County, California. By R. Mitchel Beauchamp

    • Arthur Cronquist

    Book Review Pages: 242 - 242

14. A new species of Collomia (Polemoniaceae) from the Great Basin

    • Elaine Joyal

    OriginalPaper Pages: 243 - 248

15. Systematic botany monographs

    Annoucements Pages: 248 - 248

16. Further observations on the floral anatomy and pollen morphology of Oncotheca (Oncothecaceae)

    • William C. Dickison

    OriginalPaper Pages: 249 - 259

17. Tricholoma fulvimarginatum (Tricholomataceae): A new species from North America associated with cottonwood

    • Clark L. Ovrebo
    • Roy E. Halling

    OriginalPaper Pages: 260 - 263

18. The botanical collections of Pierre-Émile Gounelle

    • Alicia Lourteig

    OriginalPaper Pages: 264 - 265

19. A new Prestoea (Palmae) from Panama, with notes on the genus

    • Andrew Henderson

    OriginalPaper Pages: 266 - 268

20. Additional notes on Senna crassiramea, S. rigidicaulis, and seeds of series Aphyllae (Caesalpiniaceae)

    • Lilia D. Bravo
    • María A. Agulló
    • Ramón A. Palacios

    OriginalPaper Pages: 269 - 272

21. New species of Solanum section Geminata (Solanaceae) from South America

    • Sandra Knapp

    OriginalPaper Pages: 273 - 301

22. Balboa (Fabaceae: Millettieae) reduced to Cracca (Robinieae)

    • Mario Sousa S.
    • Matt Lavin

    OriginalPaper Pages: 302 - 304

23. Book reviews

    • Jeanne Goode
    • Julian A. Steyermark
    • Brian M. Boom

    BookReview Pages: 305 - 308

24. Odontocarya “septemfida” is a mixture of plants of two families

    • Rupert C. Barneby

    Erratum Pages: 308 - 308