Publisher's Synopsis
Excerpt from A Biological Study of Polypodium Polypodioides (Resurection Fern) As an Air Plant in Mississippi: Dissertation Submitted to the Board of University Studies of the Johns Hopkins University in Conformity With the Requirements for the Degree of Doctor of Philosophy
I. Introduction; II. General Observations; 1. Characteristic floras of seven habitats for Polypodium as exhibited by stations 1 to 7; 2. Results of general observations on the distribution of the fern; 3. Conclusions; III. Summary of Literature on Biology of Epiphytes; IV. Measurement and Comparison of Environmental Conditions; A. Climatic Conditions; 1. Introduction; 2. Methods; (a) Light; (b) Relative humidity of the air; (c) Evaporating power of the air; (d) Temperature of the air; (e) Temperature of the substratum; 3. Results; B. Some Features of the Chemical Composition of Polypodium and Its Substratum; 1. Results of analyses of the epiphyte, of the humus and of the supporting bark; 2. Acidity of the substratum
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