1. Notices

   • Paul C. Silva

   Announcement Pages: xliii - xliv

2. Species crosses in Helianthus: I. Diploid species

   • C. B. Heiser
   • Wm. C. Martin
   • D. M. Smith

   OriginalPaper Pages: 137 - 147

3. The Andean genus Niphogeton (Umbelliferae) revisited

   • Mildred E. Mathias
   • Lincoln Constance

   OriginalPaper Pages: 148 - 155

4. Fuscoboletinus, a new genus of the Boletales

   • René Pomerleau
   • Alexander H. Smith

   OriginalPaper Pages: 156 - 172

5. New coreopsidevae from Mexico and the United States

   • Earl Edward Sherff

   OriginalPaper Pages: 172 - 173

6. Systematic position of Cnidoscolus and Jatropha

   • Kim I. Miller
   • Grady L. Webster

   OriginalPaper Pages: 174 - 180

7. Taxonomic notes on Myxomycetes, IV

   • G. W. Martin

   OriginalPaper Pages: 180 - 185

8. Metaplexis japonica: An oriental milkweed from an Iowa cornfield

   • Stanley L. Welsh
   • Dennis E. Anderson

   OriginalPaper Pages: 186 - 188

9. Nomenclatural notes on Piperaceae

   • T. G. Yuncker

   Announcement Pages: 188 - 190

10. Closing date for research proposals, National Science Foundation

    Announcement Pages: 190 - 190

11. Date of issue of Britonia, volume 14, no. 1

    Announcement Pages: 190 - 190

12. Revision of martiodendron (Cassieae, Caesalpiniaceae)

    • Robert Koeppen
    • Hugh H. Iltis

    OriginalPaper Pages: 191 - 209

13. Notes on Setaria viridis and S. Faberi (Gramineae)

    • Richard W. Pohl

    OriginalPaper Pages: 210 - 213

14. Reclassification of Rosa rapa Bosc

    • Wilson Lynes

    OriginalPaper Pages: 213 - 219

15. The genus Paulicorticium (Thelephoraceae)

    • Anthony E. Liberta

    OriginalPaper Pages: 219 - 223

16. Psychotriae Cubenses Novae (Rubiaceae)

    • J. Acuña
    • J. T. Roig

    OriginalPaper Pages: 224 - 229