36 INDEX TO AMERICAN BOTANICAL LITERATURE 
Rowlee, W. W. Relation of marl ponds and peat bogs. Brooklyn 
Bot. Gard. Mem. 1: 410-414. f. 1-3. 6 Jl 1918. 
Rumbold, C. Laboratory notes on cultures of Endothia parasitica 
A. & A. Notes on the color reactions of reproductive and vege- 
tative hyphae of E.. parasitica when treated with chemicals. Phy- 
topathology 8: 495-499. f. 6. 125 1918. 
Shannel, A. D., Scott, L. B., & Pomeroy, C.S. Citrus fruit improve- 
ment: a study of bud variation in the Marsh grapefruit. U.S. Dept. 
Agr. Bull. 697: 1-112. pl. I-11 +f. I-14. 27S 1918. 
Shear, C. L. Pathological problems in the distribution of perishable 
~ plant products. Brooklyn Bot. Gard. Mem. 1: 415-422. pl. Q-II. 
6 Jl 1918. 
Shreve, E. B. Investigations on the imbibition of water by gelatine. 
Science I]. 48: 324-327. 27 5 1918. 
Shreve, F. The Jamaican filmy ferns. Am. Fern Jour. 8: 65-74. pl. 
4.> Sy 1618: 
Shull, G. H. The duplication of a leaf-lobe factor in the shepherd’s- 
purse. Brooklyn Bot. Gard. Mem 1: 427-443. f. 1-4. 6 Jl 1918. 
Shufeldt, R. W. Grasses, sedges and some September flowers. Am. 
Forestry 24: 551-555. f. 1-8. S 1918. 
Sinnott, E. W. Isolation and specific change. Brooklyn Bot. Gard. 
Mem. 1: 444-447. 6 Jl 1918. 
Skottsberg, C. Botanische Ergebnisse der schwedischen Expedition 
nach Patagonien und dem Feuerlande 1907—-1909.—V. Die Vege- 
tationsverhaltnisse langs der Cordillera de los Andes S. von 41° S. 
Br. Kungl. Svensk. Vetenskapsakad. Handl. 56: 1-366. pl. 1-23 + 
f. I-24. 1916. ‘ 
Includes the new genera Pycnophyllopsis and Xerodraba and 31 new species in 
various genera. 
Smith, E. F. Frank N. Meyer. Science II. 48: 335, 336. 4 O 1918. 
Smith, E. F. The relations of crown-gall to other overgrowths in 
plants. Brooklyn Bot. Gard. Mem. 1: 448-453. 6 Jl 1918. 
Stewart, F. C. Tubers within tubers of Solanum tuberosum. Brook- 
lyn Bot. Gard. Mem. 1: 423-426. f. 1-3. 6 Jl 1918. 
Stone, G. E. Contact stimulation. Brooklyn Bot. Gard. Mem. 1: 
454-479. f. I-4. 6 Jl 1918. 
Taylor, N. A quantitative study of Raunkiaer’s growth-forms as il- 
lustrated by the 400 commonest species of Long Island, N. Y. 
Brooklyn Bot. Gard. Mem. 1: 486-491. 6 Jl 1918. 
