. A text-book of botany for secondary schools. Botany. 40 A TEXT-BOOK OF BOTANY one of the sticky drops, the hair begins to curve , and presently presses its victim down upon the surface of the blade. In the case of a larger insect, several of the mar- ginal hairs may join to- gether in holding it, or the whole blade may become more or less rolled inward. (6) Leaves of Dioncea. —This is one of the most famous and remarkable of insect-trapping plants, be- ing found only in certain sandy swamps near Wil- mington, N. C. The leaf- blade is constructed so as to work like a steel trap, the tw
. A text-book of botany for secondary schools. Botany. 40 A TEXT-BOOK OF BOTANY one of the sticky drops, the hair begins to curve , and presently presses its victim down upon the surface of the blade. In the case of a larger insect, several of the mar- ginal hairs may join to- gether in holding it, or the whole blade may become more or less rolled inward. (6) Leaves of Dioncea. —This is one of the most famous and remarkable of insect-trapping plants, be- ing found only in certain sandy swamps near Wil- mington, N. C. The leaf- blade is constructed so as to work like a steel trap, the two halves snapping together, and the marginal bristles interlocking like the teeth of a trap (Fig. 40). A few sensitive hairs, like feelers, are developed on the leaf surface; and when one of these is touched by a small flying or hover- ing insect, the trap snaps shut ai)d the insect is caught. Only after digestion, which is a slow process, does the trap open again. Dioncea is popularly known as the " \'enus ; Sarracenia, Drosera, and Dioncea are conspicuous repre- sentatives of the so-called carnivorous or insectivorous plants, all of which capture insects and use them for food. They are green plants, so that they manufacture carbo- hydrates; but for some reason they supplement their food manufacture with a supply of food already manufactured, and obtained from the bodies of captured Fig. 40.—^Three leaver of Dioncea: two with the traps open, one with trap shut on an insect.—After 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 Coulter, John Merle, 1851-1928. New York, D. Appleton
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1906
