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THE AMERICAN NATURALIST [Vol. XLIII 



16. Notes on the fertilization of orchids. Ann. & Mag. of Nat. Hist. iv. 4: 



141-159. 



17. Fertilisation of Leschenaultia. Gard. Chron. Sept. 1871: 1166. 



18. Fertilisation of the Fumariacefe. Nature 9: 460. 



19. The effects of cross- and self -fertilisation in the vegetable kingdom. 



20. The different forms of flowers on plants of the same species. London, 



1877, etc. 



21. Fertilisation of plants. Gard. Chron. n. s. 7: 246. 



22. Fritz Miiller on flowers and insects. Nature 17: 78. 



