1. Artificial crosses of western North American Silenes

   • A. R. Kruckeberg

   OriginalPaper Pages: 305 - 333

2. Segregate genera of the Lepidozia complex (Hepaticae) Part 2. Two new genera, Bonneria and Paracromastigum

   • Margaret Fulford
   • Jane Taylor

   OriginalPaper Pages: 334 - 339

3. Badhamia decipiens reinstated in Physarum

   • Marie L. Farr

   OriginalPaper Pages: 339 - 345

4. Recharacterization of Dichondra (Convolvulaceae) and a revision of the North American species

   • B. C. Tharp
   • Marshall C. Johnston

   OriginalPaper Pages: 346 - 360

5. The typification of Parmelia perlata (Huds.) Ach.

   • Mason E. Hale

   OriginalPaper Pages: 361 - 367

6. Low altitude mosses from northeastern New Guinea

   • Edwin B. Bartram

   OriginalPaper Pages: 368 - 380

7. Closing date for research proposals, National Science Foundation

   OriginalPaper Pages: 380 - 380

8. A second Anzia in North America

   • William L. Culberson

   OriginalPaper Pages: 381 - 384

9. A Word of Thanks from the Editor

   EditorialNotes Pages: 384 - 384

10. News and notes

    • Egbert H. Walker

    News Pages: xliv - xliv