40 Russell— Comparison of the Structure of Hybrid 



20. Nicholson, George. 



21. Moore, David. 



22. Veitch & Son. 



23. Macfarlane, J. M. 



24. Macfarlane, J. M. 



25. Bailey, L. H. 



26. Elliot, Stephen. 



27. Eaton, Amos. 



28. Macfarlane, J. M. 



29. Macfarlane, J. M. 



30. Solereder, Hans. 



31. Fenner, C. A. 



32. Goebel, K. 



33. Harper, R. M. 



34. Harper, R. M. 



35. Mohr, C. 



36. Shreve, F. 



37. Porcher, F. P. 



38. Walter, Herbert E. 



Dictionary of Gardening, Vol. III. 



Gardeners' Chronicle, Vol. XXII, p. 702 (N. S.) 



(1874). 

 Gardeners' Chronicle, Vol. XXIII, p. 73» (1874)- 

 Pflanzenreich IV, 1 10 (1906). 

 Contrib. Bot. Lab., Vol. II, p. 426 (1904)- 

 Encyclop. Horticulture, Vol. VI (1917)- 

 Botany of South Carolina and Georgia (1821). 

 Manual of Botany (1833). 

 Annals of Botany, Vol. VII, p. 445 (1893). 

 Trans. Roy. Hort. Soc, Vol. 37 (1892). 

 Anatomy of the Dicotyledons, Vol. I, p. 51 (1908). 

 Flora, Vol. 93, p. 351 (1904)- 

 Pflanzenbiologischen Schilderungen, Vol. 2, p. 89 



0893). 

 Jour. Elisha Mitchell Scientific Soc, Vol 39, No. 3 



(1918). 



Bull. Torrey Bot. Club, Vol. 34, p. 351 (1907). 



Bull. Torrey Bot. Club, Vol. 24, p. 23 (1897). 



Bot. Gazette, Vol. 42, p. 107 (1906). 



Resources of the Southern Fields and Forests 



(1869). 

 Genetics, An Introduction to the Study of Heredity, 



p. 12 (1913)- 



EXPLANATION OF PLATES 



(The above photographs were made by W. R. Taylor from specimens in the 

 Sarracenia House at the Univ. of Penna. Bot. Gardens.) 



Plate III. Micro-photographs of outer epidermis of lids of pitchers X 70. 

 Fig. 8. 5. purpurea. 

 Fig. 9. S. flava. 

 Fig. 10. 5. Catesbaei. 

 Fig. 11. 5. Drummondii. 



