l62 MORPHOLOGY OF GYMNOSPERMS 



65. DoRETY, Helen A. (Sister Helen Angela), Vascular anatomy of the seed- 

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66. , The extrafascicular cambium of Ceratozamia. Bot. Gazette 47 : 150- 



152. pi. 7. 1909. 



67. Hill, T. G., and De Fraine, E., On the seedling structure of gj'mnosperms. 

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68. ]Matte, H., Sur la structure de I'embryon et des germinations du genre 

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69. Scott, D. H., Studies in fossil botany. Second edition. London. 1909. 



70. Chamberlain, Charles J., Fertilization and embryogeny of Dioon editle. 

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71. Saxton, W. T., The development of the embryo of Encephalartos. Bot. 

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72. Pavolini, a. F., La Stangcria paradoxa Th. Moore. Nuovo Giom. Bot. 

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73. Z.\cH, Franz, Studie liber Phagocytose in den WurzalknoUchen der Cycadeen. 

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74. Smith, Frances Grace, Development of the ovulate strobilus and young 

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75. Coulter, J. M., B.a.rnes, C. R., and Cowles, H. C, A textbook of botany. 

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