64 INDEX TO AMERICAN BOTANICAL LITERATURE 
Rendle, A. B. Botany and its economic applications. Science IT. 44: 
547-557. 200 1916. 
Ricker, P. L. Two types of variable pubescence on plants. Am. Jour. 
Bot. 3: 470-473. 200 1916. 
Rigg, G. B. The toxicity of bog water. Am. Jour. Bot. 3: 436, 437. 
o O 1916. 
Robinson, B. L. A notable monstrosity of Arisaema triphyllum. 
Rhodora 18: 222, 223. f. 2. 20 1916. 
Rose, J.N. Cremnophila nutans. Addisoniat: 49. pl. 25. 305 1916. 
Rusby, H. H. The influence of radioactive earth on plant growth and 
crop production. Radium 4: 68-74. Ja 1915;—II. Radium 4: 
94-104. F 1915. 
Scott, L. B. Forgotten bud variations. Jour. Heredity 7: 452-455. 
F046 8 Wie. 
Skottsberg, C. Botanische Ergebnisse der schwedischen Expedition 
nach Patagonien und dem Feuerlande 1907-1909—IV. Studien 
iiber die Vegetation der Juan Fernandez-inseln. Kungl. Svensk. 
Vetenskapsakad. MHandl. 51: 1-73. pl. 1-7 + f. I-12. I914. 
Small, J.K. Pithecolobium guadalupense. Addisonia 1: 51, 52. pl. 26. 
30 S 1916. 
Smith, E.F. Tumorsin plants. Science I]. 44: 611,612. 27 O 1916. 
Smith, G. M. Cytological studies in the Protococcales—I. Zoospore 
formation in Characium Sieboldii A. Br. Ann. Bot. 30: 459-466. 
pl. 11 +f. 1,2. Jl1916;—II. Cell structure and zoospore forma- 
tion in Pediastrum Boryanum (Turp.) Menegh. Ann. Bot. 30: 
467-479. pl. 12 +f. 1-4. Jl 1916. 
Smith, G. M. New or interesting algae from the lakes of Wisconsin, 
Bull. Torrey Club 43: 471-483. pl. 24-26. 200 1916. 
Includes descriptions of eleven new species in Chaetosphaeridium (1), Kirchneriella 
(1), Schroederia (1), Gloeocystopsis (1), Pediastrum (1), Peroniella (1), Tetraedron (1), 
Actinastrum (1), Spirulina (1), Anabaena (1), and Lyngbya (1) and the new genus 
Gloeocystopsis. 
Stakman, E. C., & Levine, M. N. Rye smut. Minnesota Agr. Exp. 
Sta. Bull. 160: 1-19. f. 1-6. Au 1916. 
Stout, A.B. The intermittent annual growth of woody plants. Jour. 
N. Y. Bot. Gard. r7: 147-152. pl. 178. 14 O 1916 . 
Swingle, D. B., & Welch, H. Poisonous plants and stock pica 
on the ranges of Montana. Montana Agr. Exp. Sta. Circ. 51: 1-95. 
f. I-11. Ja 1916. 
