On the action of seawater on the germination of seeds. (Journ. Linn. Soc., 1 vol., 1857).
On the agency of bees in the fertilisation of papilionaceus flowers. (Ann. nat. hist., 2 vol. 1858).
On the two forms or dimorphic condition of the species of Primula. (Journ. Linn. Soc., 7 vol., 1862).
On the various contrivances by which British and Foreign Orchids are fertilised, 1862.
On the existence of two forms and their reciprocal sexual relations in the genus linum. (Journ. Linn. Soc., 1 vol., 1868).
On the sexual relations of three forms of Lythrum. (Journ. Linn. Soc., 8 vol., 1864). On the character and the hybrid-like nature of the illegitimate offspring of dimorphic and trimorphic Plants. (Journ. Linn. Soc., 10 vol., 1867).
On the specific difference between Primula veris and P. vulgaris ecc. (Ibidem, 10 vol., 1867).
Insectivorous Plants, 1 vol., 1875.
On the movements and habits of climbing Plants. (Journ. Linn. Soc., 10 vol., 1865).