. Foundations of botany. Fig. 240. — Leaves of Sundew. (Somewhatmagnified.)The one at the left has all its tentacles closedover captured prey ; the one at the right hasonly half of them thus closed. 1 Where the Sarracenia is abundant it will be found interesting and profit-able to make a careful class study of its leaves. See Geddes, Chapters Botany, Chapters I and II. INSECTIVOROUS PLANTS 343 .^ caught by a sticky secretion which proceeds from hairs onthe leaves. In one of the commonest sundews the leavesconsist of a roundish blade, borne on a moderately longpetiole. On the inner su
. Foundations of botany. Fig. 240. — Leaves of Sundew. (Somewhatmagnified.)The one at the left has all its tentacles closedover captured prey ; the one at the right hasonly half of them thus closed. 1 Where the Sarracenia is abundant it will be found interesting and profit-able to make a careful class study of its leaves. See Geddes, Chapters Botany, Chapters I and II. INSECTIVOROUS PLANTS 343 .^ caught by a sticky secretion which proceeds from hairs onthe leaves. In one of the commonest sundews the leavesconsist of a roundish blade, borne on a moderately longpetiole. On the inner surface and round the margin ofthe blade (Fig. 239) are borne a considerable number ofshort bristles, each ter-minating in a knob whichis covered with a clear,sticky liquid. When asmall insect touches oneof the sticky knobs, heis held fast and the hairsat once begin to closeover him, as shown inFig. 240. Here he soondies and then usually re-mains for many days,while the leaf pours outa juice by which thesoluble parts of
Size: 1385px × 1803px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1901
