INDEX TO AMERICAN BOTANICAL LITERATURE 185 
Standley, P. C. Ferns of Glacier National Park, Montana. Am. 
Fern Jour. 10: 97-110. 7 F 1920. 
Steinberg, R.A. Effect of zinc and iron compared with that of uranium 
and cobalt in growth of Aspergillus. Bot. Gaz. 70: 465-468. 
30 D 1920. 
Stevens, F. L. New or noteworthy Porto Rican fungi. Bot. Gaz. 70: 
399-402. f. 1-4. 24 N 1920. 
Stevens, N. E. The botany of the New England poets. Sci. Mo. 
PS AST dO. 2 1031; 
Stevenson, J. J. Interrelations of the fossil fuels. Proc. Am. Phil. 
Soc. 59: 405-511. 20 D 1920. 
Stewart, G. R., & Martin, J. C. Effect of various crops upon the 
water extract of a typical silty clay loam soil. Jour. Ag. Research 
20: 663-667. f. I-5. 15 Ja 1921. 
Stomps, T. J. Uber die verschiedenen Zustande der Pangene. Biol. 
Zentralbl. 37: 161-177. 30 Ap 1917. 
{Corrected reprint.] 
Stone, H. Les bois utiles de la Guyane Francaise—II. Ann. Mus. 
Colon. Marseille 26?: 1-68. 1918. 
Stone, R. E. Deadly poisonous mushrooms. Can. Field Natur. 34: 
74-78. f. 1-4. Ap 1920. 
Stork, H. E. Biology, morphology, and cytoplasmic structure of 
Aleurodiscus. Am. Jour. Bot. 7: 445-457. pl. 31-33. 12 Ja 1921. 
Stout, A.B. A graft-chimera in the apple. Jour. Hered. 11: 233-237. 
J. 2d. 20 Ja 1921. 
Stuckey, H. P. Work with Vitis rotundifolia, a species of Muscadine 
grapes. Georgia Exp. Sta. Bull. 133: 62-74. f. 1-6. 1920. 
Sturtevant, E. L. Notes on edible plants. New York Agr. Exp. Sta. 
1919: 1-686. 1919. Edited by U. P. Hedrick. Forms part of 
N. Y. Agr. Exp. Sta. Report 1919 and vol. 2, part 2, of 27th annual 
report of N. Y. Depart. Agr. 
Contains a brief biography of Sturtevant. 
Sturtevant, G. Notes from my hybridization records. Am. Iris Soc. 
: 20, 30. ‘Ja -ioar 
Lists fertile and sterile varieties of Iris. 
Svenson, H. K. A northeastern variety of Panicum. Rhodora 22: 
153-155. f. 1-5. 290 1920 
Panicum dichotomiflorum var, puritanorum, var. nov. 
