884 EXTERNAL AND INTERNAL FACTORS CH\P. 26 



Kostychev, S., and Solclatenkov, S. V., ibid., 2, 1. 



1927 Geiger, M., Jahrb. unss. Botan., 67, 635. 

 Romell, L. G., Flora, 121, 125. 



1928 Maximov, N. A., and Krasnosselskaja-Maximova, T. A., Ber. deut. botan. 



Ges., 46, 383. 

 INIaskell, E. J., Proc. Roy. Soc. London, B102, 467. 

 ^laskell E. J., ibid., 488. 



Montfort, C, and Neydel, K., Jahrh. wiss. BoUui., 68, 801. 

 Kostychev, S., Bazyrina, K., and Cliesuokov, V., Planta, 5, 696. 



1929 Boysen-Jensen, P., and Miiller, D., Jahrb. wiss. Botan., 70, 493. 



1930 Kostychev, S., and Berg, V., Planta, 11, 144. 

 Kostychev, S., and Kardo-Sysoeva, H.. ibid., 11, 117 

 Kostychev, S., Cliesnokov, V., and Bazyrina, K., ibid., 11, 160. 

 Harder, R., iftw/., 11,263. 



Chesnokov, V., and Bazyrina, K., ibid., 11, 457. 



Chesnokov, V., and Bazyrina, K., ibid., 11, 473. 



van der Honert, T. H., Rec. trav. botan. neerland, 27, 149. 



1931 Arnold, A., Planta, 13, 529. 

 Kostychev, S., ibid., 13, 778. 



1932 Chesnokov, V., and Bazyrina, K., Trav. inst. biol. Peterhof, 9, 58; Proc. 



Leningrad Soc. Nat. Sci., 61, 279. 

 Schoder, A., Jahrb. wiss. Botan., 76, 441. 

 van der Paauw, F., Rec. trav. botan neerland., 29, 497. 

 Jaccard, P., and Jaag, 0., Ber. deut. botan. Ges., 50, 167. 

 Jaccard, P., and Jaag, 0., Botan. Centr., Beihefte, 50, [I] 150. 

 Harder, R., Filzer, P., and Lorenz, A., Jahrb. wiss. Botan., 75, 45. 

 Hiramatsu, K., Tlioku Imp. Univ. Science Repts., II, 7, 239. 

 Chesnokov, V., Grechikhina, 0., and Jermolayeva, I., Trav. inst. biol. 



Peterhof, 9, 157; Proc. Leningrad Soc. Nat. Sci., 61, 377 



1933 Schanderl, H., and Kaempfert, W., Planta, 18, 700. 

 Kursanov, A. L., Planta, 20, 535. 



Harder, R., ibid., 20, 699. 

 Bosian, G., Z. Botan., 26, 209. 



Hoover, W. H., Johnston, E. S., and Brackett, F. S., Smithsonian Inst. 

 Ppbl. Misc. Collections, 87, No. 16. 



1934 Boysen-Jensen, P., Planta, 21, 368. 



1935 Drautz, R., Jahrb. wiss. Botan., 82, 171. 



von Guttenberg, H., and Buhr, H., Planta, 24, 163. 

 Singh, B. N., and Lai, K. N., Plant Physiol, 10, 245. 

 Stalfelt, M. G., Planta, 23, 715. 



1936 Mitchell, J. W., Botan. Gaz., 98, 87. 



1937 Monch, I., Jahrb. wiss. Botan., 85, 4. 

 Gessner, F., ibid., 85, 267. 



van Hille, J. C, Proc. Acad. Sci. Amsterdam, 40, 793. 



1938 Gessner, F., Jahrb. vnss. Botan., 86, 491. 

 Filzer, P., ibid., 86, 228. 



