1. Biosystematics of two perennial species of Helianthus (Compositae), II. Natural populations and taxonomy

   • Robert W. Long

   OriginalPaper Pages: 129 - 141

2. A remarkable new Geranium from Ecuador

   • Harold E. Moore

   OriginalPaper Pages: 141 - 143

3. Cuscuta cassytoides, a South African species, in North Carolina

   • T. G. Yuncker

   Announcement Pages: 144 - 144

4. Euphorbiaceae novae novo-galicianae

   • Rogers McVaugh

   OriginalPaper Pages: 145 - 205

5. Darbaker prize in phycology

   • Robert W. Krauss

   Announcement Pages: 205 - 205

6. A neglected Camassia

   • Julian A. Steyermark

   OriginalPaper Pages: 206 - 211

7. The genus Sararanga (Pandanaceae)

   • Benjamin C. Stone

   OriginalPaper Pages: 212 - 224