. Elements of botany. Botany; Botany. 84 ELEMENTS OE BOTANY. Sometimes the tree fails altogether to produce buds at places where they would regularly occur. In the lilac the terminal bud usually fails to appear, and the result is constant forking of the branches. 113. Adventitious Buds. — Buds which occur in irregular places, that is, not terminal nor in or near the axils of leaves, are called adventitious buds ; they may spring from the roots, as in the silver-leafed poplar, or from the sides of the trunk, as in our American elm. In many trees, for instance wil- lows and maples, they are sure
. Elements of botany. Botany; Botany. 84 ELEMENTS OE BOTANY. Sometimes the tree fails altogether to produce buds at places where they would regularly occur. In the lilac the terminal bud usually fails to appear, and the result is constant forking of the branches. 113. Adventitious Buds. — Buds which occur in irregular places, that is, not terminal nor in or near the axils of leaves, are called adventitious buds ; they may spring from the roots, as in the silver-leafed poplar, or from the sides of the trunk, as in our American elm. In many trees, for instance wil- lows and maples, they are sure to appear after the trees have been cut back. Willows are thus cut back or pollarded,. as shown in Fig. 62, in order to cause them to produce a. large crop of slender twigs, suitable for basket-making. Leaves rarely produce buds, but a few kinds do so when they are injured ; aud those of the bryophyllum, a plant allied to the garden live-for- ever, almost always send out buds from the margin when they are removed from the plant while they are still green and fresh. 114, Experiment 23. —Pinup a bryophyllum leaf on the wall of the room or lay it on the surface of moist earth, and follow, day by day, the formation and development of the buds which it may produce. This plant seems to rely largely upon leaf-budding to reproduce itself, for in a moderately cool climate it rarely flowers or seeds, but drops its living leaves freely, and from each such leaf one or several new plants may be FiG-. 62. —Brandies formed from Adven- titious Buiis oil Pollarded 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. Boston, Ginn
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