. Notes on the life history of British flowering plants. Botany; Plant ecology. CRUCIFERiE 81 twenty species have been observed, but this is probably by no means all. I have given (ante, p. 76) the embryo of this species as an illustration of an " incumbent" embryo. The genus is named from the Greek hesperos, evening, because it becomes specially sweet at night, which generally indicates fertilisation by moths. In support of this I may mention that H. Miiller's daughter. Miss Agnes Miiller, saw several species of moths visiting the allied species, H. tristis. No evening insects, how-
. Notes on the life history of British flowering plants. Botany; Plant ecology. CRUCIFERiE 81 twenty species have been observed, but this is probably by no means all. I have given (ante, p. 76) the embryo of this species as an illustration of an " incumbent" embryo. The genus is named from the Greek hesperos, evening, because it becomes specially sweet at night, which generally indicates fertilisation by moths. In support of this I may mention that H. Miiller's daughter. Miss Agnes Miiller, saw several species of moths visiting the allied species, H. tristis. No evening insects, how- ever, are as yet recorded. The plant is a native of Central and Southern Europe and Eussian Asia, except the extreme north ; it is found in England only as an escape from gardens. Sisymbrium S. officinale (Hedge-mustard).—The plant is hairy, and seems to have a peculiar affinity for dust. There is a honey-gland on each side of the two short stamens. When the flower opens, the pistil and the longer stamens project slightly. The shorter stamens are enclosed in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lubbock, John, Sir, 1834-1913. London, New York, Macmillan and Co. , Ltd.
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