. British plants : their biology and ecology. Plants; Plant ecology. CLIMBING PLANTS 117 In the shade of hedges the stems become etiolated and weak, and the plant climbs. Polygonum dmmtorum is another imperfect twiner. 3. Tendril-Climbers.—Tendrils are organs specialized for climbing. While growing, they are sensitive to con- tact, and their free ends circumnutate. On touching a support, the tendril twines round it. The free portion between the support and the plant then takes on a spiral twist, a reversal-point naturally occurring in the middle, since both ends are fixed and incapable of move
. British plants : their biology and ecology. Plants; Plant ecology. CLIMBING PLANTS 117 In the shade of hedges the stems become etiolated and weak, and the plant climbs. Polygonum dmmtorum is another imperfect twiner. 3. Tendril-Climbers.—Tendrils are organs specialized for climbing. While growing, they are sensitive to con- tact, and their free ends circumnutate. On touching a support, the tendril twines round it. The free portion between the support and the plant then takes on a spiral twist, a reversal-point naturally occurring in the middle, since both ends are fixed and incapable of movement (Fig. 36). The object of this is to bring the stem closer to its support, and at the same time to increase the strength. 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 Bevis, James Frederick; Jeffery, Henry John. London : A. Rivers
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectplants
