532 INDEX TO AMERICAN BOTANICAL LITERATURE 
Shaw, J.K. The varietal relations of crown gall. Science II. 45: 461, 
462. 11 My 1917. 
Shamel, A.D. A lemon bud variation. Jour. Heredity 8: 284. f. 73. 
25 My tor7. 
Schufeldt,R.W. Flowers that bloom in June. Am. Forest. 23: 340- 
343. f. 1-6. Je 1917. 
Shive, J. W., & Martin, W.H. The effect of surface films of Bordeaux 
mixture on the foliar transpiring power in tomato plants. Plant 
World 20: 67-86. f. r. Mr 1917. 
Shreve, F. The physical control of vegetation in rain-forest and-desert 
mountains. Plant World 20: 135-141. My 1917. 
Shufeldt, R. W. Daisies, corn cockle, bugloss, and other summer 
flowers. Am. Forest. 23: 285-2809. jf. 2-6. “My 10917: 
Shull, G. H. Where do pitcher-leafed ash trees grow? Science II. 45: 
479, 480. 18 My 1917. 
Skan, S.A. Maurandia Purpusii. Curt. Bot. Mag. IV. 13: pl. 8697. 
Mr 1917. 
A plant from Mexico. 
Skan, S. A. Quercus densiflora. Curt. Bot. Mag. IV. 13: pi. 8695. 
Mr 1917. 
A North American plant. . 
Small, J.K. Botanical explo:aticn in southern Florida in 1916. Jour. 
N. Y. Bot. Gard. 18: 98-111. pi. 195-199. My 1917. 
Small, J. K. Sagittaria latifolia. Addisonia 2: 27, 28. pl. 54. 30 
Je 1917. 
Spaulding, P. Needle rust on Pinus resinosa. Phytopathology 7: 225. 
2 Je 1917. 
Standley, P. C. (Chenopodiales). Amaranthaceae. N. Am. FI. 22: 
95-169. 9 Je 1917. 
Includes new species in Amaranthus (3), Acnida (1), Froelichia (x), Achyranthes 
(1), Gomphrena (2), and Ivesine (1). 
Standley, P.C. The Mexican and Central American species of Ficus. 
Contr. U. S. Nat. Herb. 20: I-35. 31 My 1917. 
Eighteen. new species are described. 
Stanford, E. E., & Wolf, F. A. Studies in Bacterium solanacearum. 
Phytopatehian 7: 155-165. f. 7... 2 Je 1917. 
Stevens, N. E., & Hawkins, L. A. Some changes produced in straw- 
berry fruits by Rhizopus nigricans. Phytopathology 7: 178-184. 
2 Je 1917. 
Stevens, N. E., & Wilcox, R.B. Rhizopus rot of strawberries in transit. 
U. S. Dept. Agr. Bull. 531: 1-22. f. 1. 28 My 1917. 
