1. A revision of Asimina and Deeringothamnus (Annonaceae)

   • Robert Kral

   OriginalPaper Pages: 233 - 278

2. Closing date for research proposals, National Science Foundation

   Announcement Pages: 278 - 278

3. Studies in the Capparidaceae—VII old world Cleomes adventive in the new world

   • Hugh H. Iltis

   OriginalPaper Pages: 279 - 294

4. Location and housing of institutional herbaria in The United States and Canada

   • A. R. Kruckeberg

   OriginalPaper Pages: 295 - 297

5. The hybrid nature of Viola emarginata (Nuttall) Leconte

   • Norman H. Russell
   • Arthur C. Risser

   OriginalPaper Pages: 298 - 305

6. Studies on Lactarius-II The North American species of sections Scrobiculus, Crocei, Theiogali and Vellus

   • L. R. Hesler
   • Alexander H. Smith

   OriginalPaper Pages: 306 - 350

7. The identity of Archaeopteris and Callixylon

   • Charles B. Beck

   OriginalPaper Pages: 351 - 368

8. Important notice

   Announcement Pages: c3 - c3

9. Important Notice

   Announcement Pages: iv - iv

10. News and notes

    Announcement Pages: xl - xl