122 THE STEM 



7. Clieadle, V. I., Secondary Growtli by Means of a Thickening 

 Ring' in Certain Monocotyledons. Bot. Gaz. 98 :535-555. 1937. 



8. Chamberlain, C. J., Growth Rings in a Monocotyl. Bot. Gaz. 

 72:293-304. 1921. 



9. De Bary, Ch. XIV, XV. 



10. Eames, A. J., The Vascular Anatomy* of the Flower with Ref- 

 utation of the Theory of Carpel Polymorphism. Amer. Jour. 

 Bot. 18:147-188. 1931. 



11. Eames and MacDaniels, Clis. V, VI, IX. XI. 



12. Esau, K., Ililgardia, Ontogeny and Structure of tiie Phloem 

 of Tobacco. Ibid., 11 :343-424. 1938. 



13. , . Phloem Anatomy of Tobacco Affected with 



(^urly Top and Mosaic. Ililgardia 13:437-490. 1941. 



14. Foster, A. S., Problems of Structure, Growth and Eyolution 

 in the Shoot Apex of Seed Plants. Bot. Rey. 5 :454-470. 1939. 



15. Gregoire, V., La morphogenese et 1 'autonomic morphologique 

 de I'appareil floral. La Cellule 47:287-452. 1938. 



16. Hay ward, Ch. III. 



17. llehn, J., IJntersuchungen iiber die Differenzierung der 

 Sprossscheitelmeristeme yon Dicotylen unter besonderer 

 Beriichsichtigung des Procambiums. Planta 15:105-191. 

 1932. 



18. Jeffrey, Ch. XIII. 



19. Kaplan, R., Ueber die Bildung der Stele aus dem TTrmeristem 

 von Pteridophyten und Spermatophyten. Planta 27 :224-268. 

 1937. 



20. Kiister, E., Sekundares Dickenwa'chstum ; IIolz und Rindc. 

 Allgemeine Einletung. Handbuch d. Pflanzenanatomie. IX. 

 Berlin. 1939. 



21. Louis, J., L'ontogenese du systeme conducteur dans la pousse 

 feuilh'e des Dicotylees et des Gynniosiiermes. La Cellule 44: 

 87-172. 1935. 



22. Smith, G. M., Cryptogamic Botany. Vol. IT. Ch. V. Xew 

 York. 1938. 



23. Sperlich, A., Das trophische Parenchym. B. ?]xcretionsge- 

 webe. Ilandb. d. Pflanzenanatomie. I\'. Berlin. 1939. 



24 Stover, E. L., Development and Differentiation of Tissues in 

 the Stem Ti])s of Grnsses. Ohio Jour. Sci. 34:150-160. 1934. 



25. Wilson, C. L. and -Just, T., The Morphology of the Flower. 

 Bot. Rev. 5 :97-131. 1939. 



