518 Bibliography 



Ullrich, J. 1953. Variationsstatistische Untersuchungen an Blattern. Ber. 



Deutsch. Bot. Ges. 66:322-332. 

 Umrath, K., and A. Soltys. 1936. liber die Erregungssubstanz der Papilionaceen 



und ihre zellteilungsauslosende Wirkung. Jahrb. Wiss. Bot. 84:276-289. 

 . 1953. Geschlechtsbedingte Unterschiede in der Blattform. Phyton 



4:290-299. 

 Ungerer, E. 1926. Die Regulationen der Pflanzen. 2d ed. Springer, Berlin. 



363 pp. 

 Uphof, J. C. T. 1924. On mendelian factors in radishes. Genetics 9:292-304. 

 Ursprung, A. 1912. liber die Polaritat bei Impatiens Sultani. Beih. Bot. 



Centralbl. 28, Abt. 1:307-310. 

 Van Fleet, D. S. 1952. The histochemical localization of enzymes in vascular 



plants. Bot. Rev. 18:354-398. 

 . 1954a. The significance of the histochemical localization of quinones 



in the differentiation of plant tissues. Phytomorphology 4:300-310. 

 -. 1954b. Cell and tissue differentiation in relation to growth (plants). 



Soc. Devel. and Growth, Symposium 11:111-129. 

 Van Overbeek, J. 1935. The growth hormone and the dwarf type of growth 



in corn. Proc. Natl. Acad. Sci. 21:292-299. 



. 1936. "Lazy," an a-geotropic form of maize. Jour. Hered. 27:93-96. 



. 1938. Auxin distribution in seedlings and its bearing on the problem 



of bud inhibition. Bot. Gaz. 100:133-166. 

 and L. E. Gregory. 1945. A physiological separation of two factors 



necessary for the formation of roots on cuttings. Amer. Jour. Bot. 32:336- 



341. 

 . 1946. Control of flower formation and fruit size in the pineapple. Bot. 



Gaz. 108:64-73. 

 , S. A. Gordon, and L. E. Gregory. 1946. An analysis of the functions 



of the leaf in the process of root formation in cuttings. Amer. Jour. Bot. 



33:100-107. 



and H. J. Cruzado. 1948. Flower formation in the pineapple plant by 



geotropic stimulation. Amer. Jour. Bot. 35:410-412. 

 Vardar, Y., and P. Acarer. 1957. Auxin in relation to the development of 



epiphyllous buds in Bryophyllum. Phyton 8:109-118. 

 Vazart, B. 1955. La parthenocarpie. Bull. Soc. Bot. France 102:406-443. 

 Venning, F. D. 1949. Stimulation by wind motion of collenchyma formation in 



celery petioles. Bot. Gaz. 110:511-514. 

 . 1953. The influence of major mineral nutrient deficiencies on growth 



and tissue differentiation in the hypocotyl of Marglobe tomato, Lycoper- 



sicon esculentum Mill. Phytomorphology 3:315-326. 

 Vince, Daphne. 1956. Studies of the effects of light quality on the growth and 



development of plants. II. Formative effects in Lycopersicon esculentum 



and Visum sativum. Jour. Hort. Sci. 31:16-24. 

 Vischer, W. 1915. Experimentelle Beitrage zur Kenntnis der Jugend- und 



Folgeformen xerophiler Pflanzen. Flora 108:1-72. 

 Vlitos, A. J., and W. Meudt. 1955. Interactions between vernalization and 



photoperiod in spinach. Contrib. Boyce Thompson Inst. 18:159-166. 

 Vochting, H. 1878. Uber Organbildung im Pflanzenreich. Max Cohen, Bonn. 



258 pp. 

 . 1906. liber Regeneration und Polaritat bei hohern Pflanzen. Bot. Zeit. 



64:101-148. 



