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Small lateral or terminal protuberance on the stem of a vascular plant that may develop into a flower, leaf, or shoot. Buds arise from meristem tissue. In temperate climates, trees form resting buds that are resistant to frost in preparation for winter. Flower buds are modified leaves.
This entry comes from Encyclopædia Britannica Concise. For the full entry on bud, visit Britannica.com.