. 
INDEX TO AMERICAN BOTANICAL LITERATURE 175 
Stevens, F. L. Poisoning by ZLepiofa Morgani Pk. Jour. Myc. 9: 
220-222. 31 D 1903. 
Stone,G. E. Diseases of the cucumber. Am. Gard. 23: 511. 9 Au 
1902. 
Stone, G. E. Injuries to shade trees from electricity. Mass. Agric. 
Exp. Sta. Bull. 91: 1-21. fi 7-72. Au 1903. 
Stone, G. E. & Smith, R. E. Report of the Botanists [for 1900]. 
Mass. Agric. Exp. Sta. Ann. Rep. 13: 71-83. Ja 1901 
Notes on Aster diseases ; nematode worms ; cucumber mildew ; Russian thistle ; and 
influence of chemical solutions upon the germination of seeds. 
Stone, G. E. & Smith, R. E. Report of the Botanists [for 1902]. 
Mass. Agric. Exp. Sta. Ann. Rep. 15: 27-42. 3 
Includes notes on plant diseases in 1902, and influence of sterilized soil on seed- 
germination 
Stone, W. Racial variation in plants and animals, with special refer- 
ence to the violets of Philadelphia and vicinity. Proc. Acad. Nat. 
Sci. Phila. 55: 656-699. p/. 37-39. 25 N-4 D 1903. 
Twight, E. H. Resistant vines and their hybrids. Cal. Agric. Exp. 
Sta. Bull. 148: 1-13. f. 7-37. 1903. 
Webber, H. J. Improvement of cotton by seed selection. Yearbook 
U.S. Dept. Agric. 1902: 365-386. p/. 43-45. 1903. 
Weed, C. M. New Hampshire wild flowers. N. H. Agric. Exp. Sta. 
Nature Study Leafl. 4: 35-48. Ap 1903. [Illust.] 
Weems, J. B. & Hess, A. W. A study of the food value of some of 
_ the edible fungi of Ames [Iowa]. Proc. Soc. Prom. Agric. Sci. 23: 
165-172. 1902, 
White, D. Two new species of algze of the genus Buthotrephis, from 
the Upper Silurian of Indiana. Proc. U. S. Nat. Mus. 24: 265- 
270. pl. 16-18. 30N 1901. 
B. divaricata and B. Newlinii. 
Wieland, G. R. Polar climate in time the major factor in the evolu- 
tion of plants and animals. Am. Jour. Sci. IV. 16: 401-430. D 
1903. 
Wiggers, A. F. A. Trichomes of some drugs of the United States 
Pharmacopoeia. Drugg. Circ. & Chem. Gaz. 46: 93-96. My 
1902. [Illust.] 
Wilcox, E. M. A leaf-curl disease of oaks. Ala. Agric. Exp. Sta. 
Bull. 126: 181-187. pl. +f. 1-37- O 1903. 
