Bibliography 513 



Southwick, L. 1937. Mailing stock influence on fruit size and shape. Proc. 



Amer. Soc. Hort. Sci. 35:359-361. 

 Sprague, G. F. 1953. Heterosis. In W. E. Loomis (ed.), Growth and differen- 

 tiation in plants. Pp. 113-136. 

 Springer, Eva. 1935. Uber Apogame (vegetative entstandene) Sporogone an 



der bivalenten Rasse des Laubmooses Phascnm cuspidatum. Zeitschr. Ind. 



Abst. Vererb. 69:249-262. 

 Sproston, T., and D. C. Pease. 1957. Influence of thermoperiods on production 



of the sexual stage of the fungus Sclerotinia trifoliorum. Trans. New 



York Acad. Sci. 20:199-204. 

 Spurr, A. R. 1949. Histogenesis and organization of the embryo in Pinus 



strobus. Amer. Jour. Bot. 36:629-641. 

 . 1957. The effect of boron on cell-wall structure in celery. Amer. Jour. 



Bot. 44:637-650. 

 Spurr, S. H., and M. J. Hyvarinen. 1954a. Compression wood in conifers as a 



morphogenetic phenomenon. Bot. Bev. 20:551-560. 

 and . 1954k. Wood fiber length as related to position in tree and 



growth. Bot. Bev. 20:561-575. 

 Stahl, E. 1885. Einfluss der Beleuchtungsrichtung auf die Theilung der 



Equisetumsporen. Ber. Deutsch. Bot. Ges. 3:334-340. 

 Stanfield, J. F. 1944. Chemical composition of roots and tops of dioecious 



Lychnis in vegetative and flowering phases of growth. Plant Physiol. 



19:377-383. 

 Stant, Margaret Y. 1954. The shoot apex of some monocotyledons. II. Growth 



organization. Ann. Bot., n.s. 18:441-447. 

 Stebbins, G. L., Jr. 1938. Cytological characteristics associated with the 



different growth habits in the dicotyledons. Amer. Jour. Bot. 25:189-198. 

 Steeves, T. A., and I. M. Sussex. 1957. Studies on the development of excised 



leaves in sterile culture. Amer. Jour. Bot. 44:665-673. 

 and W. R. Briggs. 1958. Morphogenetic studies on Osmunda cinna- 



monea L. The origin and early development of vegetative fronds. Phyto- 



morphology 8:60-72. 

 Steffen, K. 1956. Endomitosen im Endosperm von Pedicularis palustris L. 



Planta 47:625-652. 

 Steil, W. N. 1939, 1951. Apogamy, apospory and parthenogenesis in the 



pteridophytes. Bot. Bev. 5:433-453; 17:90-104. 

 Stein, Emmy. 1939. Uber einige Pfropfversiiche mit erblichen, durch Radium- 



Bestrahlung erzeugten Varianten von Antirrhinum majus, Antirrhinum 



siculum und Solanum lycopersicum. Biol. Zentralbl. 59:59-78. 

 Stein, O. L. 1956. A comparison of embryonic growth rates in two inbreds of 



Zea mays L. and their reciprocal hybrids. Growth 20:37-50. 

 Steinberg, R. A. 1953. Low temperature induction of flowering in a Nicotiana 



rustica X N. Tabacum hybrid. Plant Physiol. 28:131-134. 

 Steinecke, F. 1925. Zur Polaritat von Bryopsis. Bot. Archiv 12:97-118. 

 Stephens, S. G. 1944. The genetic organization of leaf-shape development in 



the genus Gossypium. Jour. Genet. 46:28-51. 

 . 1948. A comparative developmental study of a dwarf mutant in maize, 



and its bearing on the interpretation of tassel and ear structure. Ann. 



Missouri Bot. Gard. 35:289-299. 

 Sterling, C. 1945. Growth and vascular development in the shoot apex of 



Sequoia sempervirens (Lamb.) Endl. I. Structure and growth of the shoot 



apex. Amer. Jour. Bot. 32:118-126. 



