. Notes on the life history of British flowering plants. Botany; Plant ecology. 30 BRITISH FLOWERING PLANTS Many leaves "sleep'' at night, that is to say, they assume a position different from that taken in the day. This is, however, a different phenomenon from the sleep. Fig. 12. -Leaf of Clover (TrifoKum Position by day. Fig. 13.—Position by night. of flowers, and due to quite a difierent cause. As a rule they turn either up or down, thus assuming a more or less vertical position. This serves as a protection against cold, the result being that they expose less surface to the sky. The Ac
. Notes on the life history of British flowering plants. Botany; Plant ecology. 30 BRITISH FLOWERING PLANTS Many leaves "sleep'' at night, that is to say, they assume a position different from that taken in the day. This is, however, a different phenomenon from the sleep. Fig. 12. -Leaf of Clover (TrifoKum Position by day. Fig. 13.—Position by night. of flowers, and due to quite a difierent cause. As a rule they turn either up or down, thus assuming a more or less vertical position. This serves as a protection against cold, the result being that they expose less surface to the sky. The Acacia (Eobinia), Ox- alis, Trifolium (Clover), (Figs. 12 and 13) are cases in point. Against the attacks of animals leaves are protected in various ways : by a leathery texture, by spines, by felted hair, by bitter or Fig. 14.—Group of stinging-nettles on the arOmatic Sap, ctc. Some right, and Dead-nettles on the left. t i • i plants, which are com- paratively unprotected, mimic others which are more fortunate. Thus the leaves and general habit of the Dead-nettle closely resemble those of the Stinging- nettle. Fig. 14 represents a group, those on the right being Stinging-nettles, those on the left the white Dead-. 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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Keywords: ., bookauthorlub, bookcentury1900, bookdecade1900, booksubjectbotany
