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On the Character and Hybrid-like Nature of the Offspring from the Illegitimate Unions of Dimorphic and Trimorphic Plants. [1868.] Linnean Society Journal x. 1869 ("Botany"), pages 393-437.
On the Specific Difference between Primula veris, British Fl. (var. officinalis, of Linn.), P. vulgaris, British Fl. (var. acaulis, Linn.), and P. elatior, Jacq.; and on the Hybrid Nature of the common Oxlip. With Supplementary Remarks on naturally produced Hybrids in the genus Verbascum. [1868.] Linnean Society Journal x. 1869 ("Botany"), pages 437-454.
Note on the Habits of the Pampas Woodpecker (Colaptes campestris). Zoological Society Proceedings November 1, 1870, pages 705-706.
Fertilisation of Leschenaultia. "Gardeners' Chronicle", page 1166, 1871.
The Fertilisation of Winter-flowering Plants. 'Nature,' November 18, 1869, volume i. page 85.
Pangenesis. 'Nature,' April 27, 1871, volume iii. page 502.
A new view of Darwinism. 'Nature,' July 6, 1871, volume iv. page 180.
Bree on Darwinism. 'Nature,' August 8, 1872, volume vi. page 279.