1. A monograph of the genus Rosa in North America. I. R. acicularis

   • Walter H. Lewis

   OriginalPaper Pages: 1 - 24

2. Myxomycetes from Greece

   • Const J. Alexopoulos

   OriginalPaper Pages: 25 - 40

3. A hybrid among the perennial gentians

   • Charles T. Mason

   OriginalPaper Pages: 40 - 43

4. Morphological variation of Setaria faberii and S. viridis

   • David E. Fairbrothers

   OriginalPaper Pages: 44 - 48

5. Notes and news

   • H. W. Rickett

   Announcement Pages: vi - viii

6. A verticillate variant of Viburnum alnifolium

   Announcement Pages: xv - xv