OF CASTALIA ODORATA AND NYMPHAEA ADVENA 219 
Coulter and Dr. Charles J. Chamberlain, of the University of Chi- 
cago, for valuable suggestions in the first part of the investigation, 
and to Professor J. H. Schaffner, of the Ohio State University, for 
very valuable assistance in the later studies. 
2 LITERATURE 
Only those papers are cited to which reference has been made. 
1. Coulter, J. M. Contribution to the Life History of Ranunculus. 
Bot. Gaz. 25: 73-88. 1898. 
2. Coulter, J. M., et al. Contributions to the Life History of Lidium 
Philadelphicum. Bot. Gaz. 23: 412-452. 1897. 
3. Chamberlain, C. J. The Embryo-sac of Aster Novae-Angliae. 
Bot. Gaz. 20: 205-212. 1895. 
4. Campbell, D. H. A morphological Study of Matas and Zannt- 
chellia. Proc. Cal. Acad. Sci. 1: 1-61. 1897. 
5. Campbell, D. H. Studies on the Flower and Embryo of Sfar-_ 
ganium. Proc. Cal. Acad. Sci. 1: 293-328. 1899. 
6. Guignard, L. La double fecondation dans le WVa‘as mayor. Jour. 
de Bot. 15. 1900. 
7. Hegelmaier, Dr. Untersuchungen iiber die Morphologie der 
Dikotyledonen-Endosperms. Nova Acta d. K. L. C. D. Akad. d 
Naturforcher. 49. 188 5: 
8, Holferty, G. M. Ovules and Embryo of Potamogeton natans. 
Bot. Gaz. 31: 339-346. 1g01. 
9. Lyon, H. L. Observations of Embryogeny of WVe/uméo. Minn. 
Bot. Studies, 2: rgor. 
To. Lloyd, Buk, Comparative Embryology of the Rubiaceae. Mem. 
Torrey Club, 8: 1—26. 1899. 
sz, Riddle, a. The Embryology of A/yssum. Bot. Gaz. 26: 314- 
324. 1808. 
12. Schaffner, J. H. The Life History of Sagittaria variabilis. Bot. 
Gaz. 23: 252-273. 1897. 
13. Schaffner, J.H. A Contribution to the Life History and Cytology 
Of Erythronium. Bot. Gaz. 31: 369-387. 1901. 
14. Van Tieghen, Ph. Elements de Botanique. 1898. 
15. Weigand, K.M. The Development of the Embryo-sac in some 
be Monocotyledonous Plants. Bot. Gaz. 30: 25-47. 19090. 
Explanation of Pilates 
PLATE 12 
Castalia odorata (except Fig. 16 which is C. Zanzibariensis). 
Fic. One archesporial cell. 
