1. Revision of dicentra (Fumariaceae)

   • Kingsley R. Stern

   OriginalPaper Pages: 1 - 57

2. New taxa of peruvian piperaceae

   • T. G. Yuncker

   OriginalPaper Pages: 58 - 63

3. Trees and shrubs of Mexico

   OriginalPaper Pages: 63 - 63

4. Chromosome numbers in the Compositae-III. Certain Mexican species

   • B. L. Turner
   • Marshall C. Johnston

   OriginalPaper Pages: 64 - 69

5. Asplenium X Gravesii in Kentucky

   • Dale M. Smith
   • Truman R. Bryant
   • Donald E. Tate

   OriginalPaper Pages: 69 - 72

6. New York Botanical Garden scholarship

   OriginalPaper Pages: 72 - 72

7. The lopezieae (Onagraceae)

   • Philip A. Munz

   OriginalPaper Pages: 73 - 90

8. The genus argemone in South America and Hawaii

   • Gerald B. Ownbey

   OriginalPaper Pages: 91 - 109

9. Taxonomic notes on Myxomycetes, III

   • G. W. Martin

   OriginalPaper Pages: 109 - 113

10. A new Liriosma from Roraima

    • Joseph Monachino

    OriginalPaper Pages: 113 - 115

11. Chromosome numbers and breeding systems in Pycnanthemum (Labiatae)

    • Henrietta L. Chambers

    OriginalPaper Pages: 116 - 128