176 Boeshore — The Morphological Continuity of 



Fig. 22. Stamen of Conopholis, front and back views. 



Fig. 23. Stamen of Epiphegus, front and back views. 



Fig. 24. Stamen of Gerardia aphylla. 



Fig. 25. Stamen of Orobanche minor. 



Fig. 26. Stamen of Orobanche coerulea. 



Fig. 27. Stamen of Aphyllon nniflorum, front and back views. 



Fig. 28. Epidermal cells and stomata on a scale of Conopholis. (X 



ii5). 



Fig. 29. Transverse section of the awn-like horn at the base of an an- 

 ther of Aphyllon. The epidermal tissue shows cells with the outer and 

 radial walls much thickened in u-shaped manner. (X 1 15)- 



Fig. 30. A longitudinal section of the awn-like horn of an anther of 

 Aphyllon. (X 115). 



Plate XVI. 



Fig. 32. Aerial flowering shoots of Conopholis showing attachment at 

 the base to the swelling on the oak root. Originally there were 40 

 shoots growing from the one swelling. (X }4). 



Fig- 33- Tuberous swelling on oak root showing the numerous excres- 

 cences from which the flowering shoots arise. (X H)- 



LITERATURE CITED 



1. Wettstein, R. Die naturlichen Pflanzenfamilien. IV. 3. B, 1895. 



2. Beck, G. R. Die naturlichen Pflanzenfamilien, IV. 3. B, 1895. 



3. Fritsch, Karl. Die naturlichen Pflanzenfamilien IV. 3. B, 1895. 



4. Baillon, H. Histoire des Plantes, X, 1891. 



5. Le Maout, E. and Decaisne, J. Descriptive and Analytical Botany, 

 English Translation, 1876. 



6. Warming, E. A Handbook of Systematic Botany, 1895. 



7. Heinricher, E. Die griinen Halbschmarotzer. Jahrbiicher fur wis- 

 senschaftliche Botanik, 32, 1898. 



Die griinen Halbschmarotzer. Jahrbiicher fur wissenschaftliche Botanik, 



36, 1901. 



8. Solms-Laubach, H. Ueber den Bau u. die Entwicklung parasitischer 

 Phanerogamen. Jahrbiicher fur wissenschaftliche Botanik, 6, 1867-68. 



9. Beck, G. R. Monographie der Gattung Orobanche. Bibliotheca Bot- 

 anica, Heft 19, 1890. 



10. Koch, L. Die Entwicklungsgeschichte der Orobanchen, 1887. 



11. Henderson, M. W. Contributions from the Botanical Laboratory 

 of the University of Pennsylvania, V, 1919. 



12. Beck, G. R. Die naturlichen Pflanzenfamilien, IV. 3. B, 1895. 



13. Worsdell, W. C. On the Comparative Anatomy of Certain Spec- 

 ies of the Genus Christisonia. Annals of Botany. IX, 1895. 



14. Kerner, A. The Natural History of Plants, translated by Oliver, 



L 1895- 



15. Kerner, A. The Natural History of Plants, translated by Oliver, 



I, 1895. 



16. Koch, L. Die Entwicklungsgeschichte der Orobanchen, 1887. 



