. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Fig. of strawberry. strawberries the runners begin to form after thefruit is off, and a new plant arises from eachjoint, if the soil is not too hard or the runner isnot disturbed. A runner differs from a layer inthe fact that it is prostrate from the beginning,*and makes new plants while it is increasing inlength, 461. Some of the osiers, dewberries, and all theblack-cap raspberries propagate by stolons, which arelayers that root only or chiefly at or near the tips, w
. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Fig. of strawberry. strawberries the runners begin to form after thefruit is off, and a new plant arises from eachjoint, if the soil is not too hard or the runner isnot disturbed. A runner differs from a layer inthe fact that it is prostrate from the beginning,*and makes new plants while it is increasing inlength, 461. Some of the osiers, dewberries, and all theblack-cap raspberries propagate by stolons, which arelayers that root only or chiefly at or near the tips, with which fruit-growers set aberry plantation, are masses of roots, crowned bya heavy bud, and which have arisen by the end of XUIi-jyUXS AND LAYERS 369 the cane striking, the ground and taking root, asshown in Fig. 388. A stolon is not prostratethroughout its length, but makes a high loop be-tween the parent plant and its contact with the. Fig. of black raspberry. earth. The shoots which become stolons are atfirst upright, but the weight of the branch forcesthe end to the ground. 461a. The praotioe of layering consists in bending down branchesand covering them with earth at the points from which it is de-sired that new plants arise. Horticulturists make no distinction interminology between prostrate layers, like that in Fig. 386, andstolons. In plants which root with difficulty, the horticulturist outsthrough the bark, or breaks it, at the covered points, for rootsusually start more readily from wounded surfaces. 462 We have already studied the house-leek(Fig. 372), and have observed that it propagatesby offsets. An offset differs from a layer in thefact that it is prostrate from the beginning, andfrom a runner because it usually makes but one 370 Zinssows WITS plants plant. It is essentially, however, a special kindof runner. This type of propagation is Roots may act as runners. The red rasp-berr
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