386 A CENTURY Of PROGRESS IN THE NATURAL SCIENCES 



Huxley, J. 



1940. The New Systematics. viii + 583 pp. Oxford: Clarendon Press. 



IKENO, S. 



1898. Untersuchungen iiber die Entwicklung der Geschlechtsorgane und den Vor- 

 gang der Befruchtung bei Cycas r-evoluta. Journ. Coll. Sci. Imp. Univ. Tokyo, 

 12:151-214. 



International Association of Wood Anatomists, Committee on Nomenclature 

 1933. Glossary of terms used in describing woods. Trop. Woods, no. 36, pp. 1-12. 



Janchen, E. 



1949. Das System der Koniferen. Sitzungsber. Oesterr. Akad. Wiss., math.-naturw. 



Kl. (div. 1), 158:155-262. 



Jeffrey, E. C. 



1899a. The development, structure, and affinities of the genus Equisetum. Mem. 

 Boston See. Nat. Hist, 5:155-190. 



1899b. The morphology of the central cylinder in the angiosperms. Trans. Canad. 

 Inst, 6:599-636. 



1902. The structure and development of the stem in the Pteridophyta and gymno- 

 sperms. Philos. Trans. Roy. Soc. London, B 195:119-146. 



1908. On the structure of the leaf in Cretaceous pines. Ann. Bot., 22:593-602. 



1910. The Pteropsida. Bot Gaz., 50:401-414. 



1912. The history, comparative anatomy and evolution of the Araucarioxylon type. 

 Proc. Amer. Acad., 48:531-549, 551-561, 563-571. 



1917. The Anatomy of Woody Plants, x + 478 pp. Chicago: Univ. Chicago Press. 

 1925. The origin of parenchyma in geological time. Proc. Nat. Acad. Sci. Washington, 

 11:106-110. 



Jeffrey, E. C, and R. E. Torrey 



1916. Ginkgo and the microsporangial mechanisms of the seed plants. Bot. Gaz., 

 62:281-292. 



Jensen, H., and A. Levan 



1941. Colchicine-induced tetraploidy in Sequoia gigantea. Hereditas, Vols. 220-224. 



Johansen, D. a. 



1950. Plant Embryology. Embryogeny of the Spermatophyta. xviii + 305 pp. Waltham, 



Mass.: Chronica Botanica Co. 



1951. A modern classification of the plant kingdom. Biologia (Chron. Bot.), 2:200-201. 



Johnson, M. A. 



1951. The shoot apex in gymnosperms. Phytomorphology, 1:188-204. 



JUEL, H. 0. 



1900. Beitrage zur Kenntniss der Tetradenteilung. Jahrb. Wiss. Bot., 35:626-659. 

 1904. tJber den Pollenschlauch von Cupressus. Flora, 93:56-62. 



Karstens, W. K. H. 



1945. Variability of the female reproductive organs in Ginkgo Mloba L. Blumea, 5: 

 532-553. 



Kershaw, E. M. 



1912. Structure and development of the ovule of Bowenia spectahilis. Ann. Bot., 

 26:625-646. 



KiDSTON, R. 



1904. On the fructification of Neuropteris heterophylla Brongniart. Philos. Trans. 

 Roy. Soc. London, B 197:1-5. 



