. Practical botany. Botany. THE AXl) THE LEAF 61 Climbers are, however, quite generally distributed, and many are familiar plants of our own flora. They may be roughly classed into (1) scramblers, (2) root climbers, (3) twiners, and (4) tendril climbers. Scramblers sprawl among and over the tops of bushes and thickets. Examples are some kinds of asparagus, our common climbing rose, and cleavers ((JaJivm Apurlne^.. Fig. 48. "Woodbine or Virginia creeper, a tendril climber Reduced Twiners raise themselves by winding the stem about any slen- der upright support that offers itself. Well
. Practical botany. Botany. THE AXl) THE LEAF 61 Climbers are, however, quite generally distributed, and many are familiar plants of our own flora. They may be roughly classed into (1) scramblers, (2) root climbers, (3) twiners, and (4) tendril climbers. Scramblers sprawl among and over the tops of bushes and thickets. Examples are some kinds of asparagus, our common climbing rose, and cleavers ((JaJivm Apurlne^.. Fig. 48. "Woodbine or Virginia creeper, a tendril climber Reduced Twiners raise themselves by winding the stem about any slen- der upright support that offers itself. Well-known examples are pole beans, morning-glories, and the hop. The details of the process by which twiners wind themselves about a supporting object cannot be very briefly stated. If carefully watched, the growing tip of the shoot will often be found to describe revolving movements like those of the hands of a watch. When the movement is arrested by contact of the shoot with an ob- ject not too large for the climber to twine about, the resistance which the young moving stem encounters causes it to wind permanently around the resisting object (Fig. 47). Usually the direction of the coils for any given plant is 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 Bergen, Joseph Y. (Joseph Young), 1851-1917; Caldwell, Otis William, 1869- joint author. Boston, New York [etc. ] Ginn and company
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