The Ohio Naturalist. [Vol. XI, No. 6, 



Literature Cited. 



1. i\NDRE\vs, E. B. Descriptions of fossil plants from lower car- 



boniferous strata. Gcol. vSin-v. Ohio, Palaeontology II: 

 413-42(3, 1S75. 



2. BowNOCKER, J. A. The occurrence and exploitation of petro- 



leum and natural gas in Ohio, Geol. Surv. Ohio, Bull. I, 

 1903. 



3. BowNOCKER, y. A., Lord, N. W., Somermeyer, E. E. Coal, 



Geol. Surv.' Ohio, Bull. 9, 19US. 



4. Claypole, E. W. On the occurrence of a fossil tree in the 



Clinton, limestone base of the Upper Silurian of Ohio. 

 Geol. Mag., 2, V: 55S-564, LS78. 



5. Chamberlin, T. C. and Salisbury, R. D. Geologv, New 



York. 190(). 



6. Czapek, F. Die Ernahrungsphysiologie der Pfianzen seit 



1896. Progressus Rei Botanicae I; 468. 1907. 



7. Dachnowski, a. The toxic property of Bog Water and Bog 



vSoil. Bot. Gaz. 46; 130-143. 1908^' 



8. Bog toxins and their effect upon soils. Bot. Gaz. 



47: 389-405, 1909. 



9. Physiologically arid habitats and drought resistance 



in plants.' Bot. Gaz.' 49: 325-340. 1910. 



10. The yegetation of Cranberry Island, Ohio, and its 



relations to the substratum, temperature and evaporation. 

 Bot. Gaz. ol: 241-000. 1911. 



11. Foerste, a. F. An examination of Glyptodendron, Claypole, 



and of other so-called Silurian land plants of Ohio. Am. 

 Geol. 12: 133. 1893. 



12. Leverett, F. Glacial formations and drainage features jof 



the Erie and Ohio basins. LL S. Geological vSurvey 41, 1902. 



13. Lesquereux, L. Land plants recently discovered in the 



Silurian rocks of the United States. Proc. Am. Philos. 

 Soc. 17: 163-173. 1877. 



14. Description of the coal flora of the Carbonifer- 

 ous formation in Pennsylvania and throughout the United 

 States. Geol. Sury. Pennsylyania, II: 695-977, 1884. 



15. McDougal, D. T. Influence of Aridity upon the evolutionary 



development of plants. The Plant Worid 12: 217-230, 1909. 



16. Miller, vS. A. (Description of Species.) Cincinnati Ouarterly 



Journal of Science I: 235, 1874; II: 24-39 and 104-118, 1879. 



17. Newberry, J. S. On the so-called land plants from the lower 



Silurian of Ohio. Am. Jour. Sci. 3d S. 8: 110-113, 1874. 

 IS. Devonian plants from Ohio. ]o\\v. Cincinnati 



Soc. Nat. Hist., 22: 48. 1898. 

 19. Descriptions of fossil plants. Geol. Sury. Ohio, 



Palaeontology I: 359-385, 1873. 



