1. Studies in saxifragaceae—I. The heuchera cylindrica complex in and adjacent to British Columbia

   • J. A. Calder
   • D. B. O. Savile

   OriginalPaper Pages: 49 - 67

2. Thalictrum cooleyi sp. nov.

   • Harry E. Ahles

   OriginalPaper Pages: 68 - 70

3. The taxonomic status of saxifraga palmeri

   • Julian A. Steyermark

   OriginalPaper Pages: 71 - 77

4. The segregate genera of the Lepidozia complex (Hepaticae) part 1. Sprucella steph. and neolepidozia gen. Nov.

   • Margaret Fulford
   • Jane Taylor

   OriginalPaper Pages: 77 - 85

5. Contribution to the mosses of the highlands of Eastern New Guinea

   • Edwin B. Bartram

   OriginalPaper Pages: 86 - 98

6. On the genus Hobsonia

   • G. W. Martin

   OriginalPaper Pages: 98 - 101

7. The American society of plant taxonomists constitution and by-laws

   OriginalPaper Pages: 101 - 104

8. Notes and news

   News Pages: xxiv - xxiv

9. Editorial note

   • H. W. Rickett

   EditorialNotes Pages: xxxii - xxxii