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Notes and References
This item contains 6 references.
1BAILEY, I. W., Anatomical characters in the evolution of Pinus. Amer. Nat.44:284-293. 1910.
2BROWN, F. B. G., Scalariform pitting a primitive feature in angiospermous secondary wood. ScienceN.S.48: 16-18. 1918.
3JEFFREY, E. C., Anatomy of woody plants. University of Chicago Press. 1917a
4SOLEREDER, HANS, Systematic anatomy of the Dicotyledons. Trans. by BOODLE and FRITSCH. Oxford. Clarendon Press. 1908.
5THOMPSON, W. P., Independent evolution of vessels in Gnetales and Angio- sperms. BOT. GAZ.65:89-go. 1918.
6— Anatomy and relationships of the Gnetales. I. Ephedra. Ann. Botany26:1077-II04. 1912.