. Plant life in Alpine Switzerland; being an account in simple language of the natural history of Alpine plants. Mountain plants. THE BUTTERWORTS 213 of these glands on a square centimetre of the leaf, and consequently a plant with a rosette of six to nine leaves is estimated to possess about half a million. In the photograph on Plate XLI., Fig. 2, two rosettes of Pinguicula leaves are seen, thriving on a cushion of damp moss, which is itself attached to the root of a Spruce Fir. It will be noticed that numerous remains of dead insects, chiefly flies, occur on the leaves of the. Fio. XIX.'—The
. Plant life in Alpine Switzerland; being an account in simple language of the natural history of Alpine plants. Mountain plants. THE BUTTERWORTS 213 of these glands on a square centimetre of the leaf, and consequently a plant with a rosette of six to nine leaves is estimated to possess about half a million. In the photograph on Plate XLI., Fig. 2, two rosettes of Pinguicula leaves are seen, thriving on a cushion of damp moss, which is itself attached to the root of a Spruce Fir. It will be noticed that numerous remains of dead insects, chiefly flies, occur on the leaves of the. Fio. XIX.'—The Common Butterwort {Pinguicula vulgaris, Linn.). 1. Transverse section of a leaf, showing the glands on the upper surface. Somewhat enlarged. 2. A side view of a gland. Much enlarged. 3. A surface view of a gland. Much enlarged. larger rosettes, and in one case, on the uppermost leaf of the smaller rosette, growing below and slightly to the right of the larger rosette, the remains of a moth are clearly seen. This plant has the power, not only of catching small insects on its leaves, but of digesting and absorb- ing them. What happens is briefly as follows. The glandular hairs of the upper surface secrete a sticky fluid, which attracts insects, probably under the. 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 Arber, Edward Alexander Newell, 1870-. London, J. Murray
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1910
