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CHE REFERENCE LIBRARY - Pole Shift Survival Information

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CHAPTER<br />

IV<br />

PROPAGATION BY MEANS OF LAYERS AND RUNNERS<br />

M,~NY plants habitua811y propagate by means of decumbent<br />

shoots and runners. These shoots become more or less covered<br />

with earth or leaves, and roots are formed, usually at the joints.<br />

In many cases, t.he old shoots die away and an entirely inde-<br />

FIG. 5%<br />

A runner of strawberry.<br />

pendent plant arises from each fascicle of roots. in other<br />

plants, the shoots remain attached to the parent, at least for<br />

a number of years, so that the plant comprises a colony of<br />

essentially independent but connected individuals.<br />

Certain definitions should be clearly understood before we<br />

proceed with the discussion. A runner is a shoot t.hat trails<br />

on the ground, taking root at intervals ; the strawberry produces<br />

true runners (Fig. 58). Sometimes the runner is covered<br />

by the accumulating surface mold (Fig. 59). A root may sometimes<br />

act as a runner. A stoblz is a decumbent or lopping<br />

shoot which, without artificial aid, takes root and forms an<br />

independent plant. It usually starts more or less erect and<br />

bends over to the ground as it grows. The honeysuckles, some<br />

69

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