CONTENTS 



PAGE 



No. 1. Notes on the Californian Species of Trillium L., by Thomas Harper 



Goodspeed and Robert Percy Brandt 1-24 



I. A Report of the General Results of Field and Garden Studies, 



1911-1916 1 



No. 2. Notes on the Californian Species of Trillium L., by Thomas Harper 



Goodspeed and Robert Percy Brandt 25-38 



II. The Nature and Occurrence of Undeveloped Flowers 25 



No. 3. Notes on the Californian Species of Trillium L., by Robert Percy 



Brandt 39-68 



III. Seasonal Changes in Trillium Species with Special Reference 



to the Reproductive Tissues 39 



No. 4. Notes on the Californian Species of Trillium L., by Thomas Harper 



Goodspeed 69-100 



IV. Teratological Variations of Trillium Sessile var. giganteum 



H. & A 69 



No. 5. A Preliminary List of the Uredinales of California, by Walter C. 



Blasdale 101-157 



I. Introductory statement 101 



II. The need of experimental culture work 102 



III. Plan of the present paper 103 



IV. Acknowledgments 104 



V. General features of the Uredinales 104 



VI. List of species '. 105 



VII. Index to the species of Uredinales 150 



VIII. Index to the species of host plants 153 



Nos. 6-8. A Rubber Plant Survey of Western North America, by Harvey 



Monroe Hall and Thomas Harper Goodspeed 159-278 



6. Chrysothamnus nauseosus and its Varieties, by Harvey Monroe 



Hall 159-181 



I. Introduction and acknowledgments 159 



II. Key to the varieties of Chrysothamnus nauseosus 163 



III. Synopsis of the varieties of Chrysothamnus nauseosus 165 



IV. Index of specific and varietal names 181 



7. Chrysil, a New Rubber from Chrysothamnus nau^eosu^, by Harvey 

 Monroe Hall and Thomas Harper Goodspeed 183-264 



I. Object and scope of the investigation 184 



II. Acknowledgments 186 



III. Nature and properties of Chrysil 188 



IV. Botanical classification; the names of the plants 189 



V. Chrysothamnus nauseosus: habit, flowering, rate of growth, 



etc 191 



VI. Distribution and habitats of the various forms 194 



VII. Estimates by districts of the amount of Chrysil available 



in western North America 197 



a. District 1. East Central California and adjacent 



Nevada 198 



b. District 2. Mojave Desert, California 200 



c. District 3. Northeastern CaUfornia and adjacent 



Nevada and Oregon 201 



d. DLstrict 4. West central Nevada 202 



e. District 5. Northern and central Nevada 204 



/. District 6. Utah 207 



g. District 7. Colorado 208 



h. Estimates not included in the above districts 209 



i. Conclusions as to the quantity of rubber obtainable 209 



[i] 



