I30 
EDMUND W. SINNOTT 
7. The seedling of dicotyledons is therefore variable in certain of 
its characters and conservative in others, thus emphasizing the im- 
portance of studying conservatism and variability in connection with 
particular characters rather than with particular organs or regions. 
The writer wishes to thank Professor I. W. Bailey, of the Bussey 
Institution of Harvard University, for the privilege of looking over 
many of his preparations and for information as to seedling structure 
in a number of families. 
Connecticut Agricultural College, 
Storks, Connecticut 
BIBLIOGRAPHY 
1. Hill, T, G,, and de Fraine, E. A Consideration of the Facts Relating to the 
Structure of Seedlings. Annals of Botany 27: 257-272. 1913. 
2. Sinnott, E. W. The Anatomy of the Node as an Aid in the Classification of 
Angiosperms. Amer. Journ. Bot. i: 303-322. 1914. 
3. Sinnott, E. W., and Bailey, I. W. Foliar Evidence as to the Ancestry and Early 
Climatic Environment of the Angiosperms. Amer. Journ. Bot. 2: 1-22. 
1915. 
4. Thomas, E. N. A Theory of the Double Leaf Trace, founded on Seedling Struc- 
ture. New Phytologist 6: 77-91. 1907. 
5. Thomas, E. N. Seedling Anatomy of Ranales, Rhoedales and Rosales. Annals 
of Botany 28: 695-733. 1914. 
