432 INDEX TO AMERICAN BOTANICAL LITERATURE 
Stone, R. E. Common edible and poisonous mushrooms of Ontario, 
Ontario Dept. Agr. Bull. 263: 1-24. Je 1918. 
Stout, A. B., & Boas, H. M. Statistical studies of flower number per 
head in Cichorium Intybus: kinds of variability, heredity, and 
effects of selection. Mem. Torrey Club 17: 334-458. pl. 10-13 + 
702.10 Je 191% 
Stout, A. B. Duplication and cohesion in the main axis in Cichorium 
Intybus. Brooklyn Bot. Gard. Mem. 1: 480-485. pl. 12 +f. 1. 
6 Jl 1918. 
Stout, A. B. Hibiscus Moscheutos. Addisonia 3: 37, 38- pl. 99. 29 
Je 1918. 
Stuart, W. Some correlations in potatoes. Proc. Ann. Soc. Hort. 
Sci. 1917: 39-45. Mr 1918. 
Stuckey, H. P. The two groups of varieties of the Hicoria pecan and 
their relation to self-sterility. Proc. Soc. Hort. Sci. 1915: 41-44. 
F 1916. 
Taubenhaus, J. J. Pox, or pit (soil rot), of the sweet potato. Jour. 
Agr. Research 13: 437-450. pl. 51,52. 27 My 1918. 
Tehon, L. R. Systematic relationship of Clithris. Bot. Gaz. 65: 
552-555- pl. 18 Je 1918. 
Includes Clithris clusiae, C. minor, and C. pandant, spp. nov. 
Weir, J. R. Experimental investigations on the genus Razoumofskya. 
Bot. Gaz. 66: 1-31. f. r-r9. 15 Jl 1918. aoe 
Weir, J.R. Forest disease surveys. U.S. Dept. Agr. Bull. 658: I-23. 
J. 1-23. 32 Je 1918. 
Weldon, G. P. Pear growing in California. Month. Bull. State 
Comm. Hort. Calif. 7: 222-410. f. 7-186. My 1918. [Illust.] 
Contains chapter on diseases of pears. 
Wells, B. W. The Zoocecidia of northeastern United States and 
eastern Canada. Bot. Gaz. 65: 535-542. .18 Je 1918. 
Whipple, O. B. Methods in pure line selection work with potatoes. 
Proc. Am. Soc. Hort. Sci. 1917: 34-38- Mr 1918. 
White, O.E. Breeding new castor beans. Jour. Heredity 9: 195-200. 
f. 1-4 + frontispiece. 25 My 1918. 
White, O. E. Our common garden vegetables, their history and their 
origin. Brooklyn Bot. Gard. Leaflets 6: [1-19]. f. 5. 1 My 1918. 
White, O.E. Inheritance studies in Pisum. Ill. The inheritance of 
height in peas. Mem. Torrey Club 17: 316-322. f. I- 10 Je 1918. 
