1. A revision of Lysipomia (Campanulaceae, Lobelioideae)

   • Rogers McVaugh

   OriginalPaper Pages: 69 - 105

2. Lobeliacearum species Novae Austro-Americanae

   • F. E. Wimmer

   OriginalPaper Pages: 107 - 111

3. Studies in tropical American leguminosae—II

   • Richard S. Cowan

   OriginalPaper Pages: 113 - 113

4. Carlos Alberto O’Donell, 1912–1954

   • Fred A. Barkley

   OriginalPaper Pages: 115 - 120

5. A cytogenetic study in the Acanthaceae

   • William F. Grant

   OriginalPaper Pages: 121 - 149

6. A new genus and other novelties in compositae

   • Josė Cuatrecasas

   OriginalPaper Pages: 151 - 163