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50. Elmore, C. J. Some Results from the Study of Allium. Bot. 



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51. Riddle, Lumina C The Embryology of Alyssum. Bot. Gazette 



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53. Juel, H. O. Parthenogenesis bei Antennariq alpina (L.) R. Br. 



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54. Caldwell, O. W. On the Life History of Lemna minor. Bot. 



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57. LLOYD, F. E. The Comparative Embryology of the Rubiaceae. 



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