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Rh that time ceased to elongate to any considerable extent farther—they may be seen as small, green, hairy bodies. During the remainder of the summer the chief changes going on in these buds is a slow swelling, due to the



19.—A. End of a branch of oak showing the characteristic winter buds. B. A group of buds (slightly magnified): a, bud-scales; d, leaf-scars. C. The same, in longitudinal section: a, bud-scales (stipules); b, young leaves; c, vascular bundles; d, leaf-scars. (Prantl and Hartig.)

gradual storing up of nutritive materials in the pith and growing-point and to the slow division of the cells.

A vertical section through the bud at the end of the autumn shows the following structures (Fig. 19, C): A conical growing-point, consisting of embryonic tissue,