A bud that grows from the axil of a leaf and may develop into a branch or flower cluster. Also called lateral bud.
- Whereas leaves remain microscopic even when fully developed, each spine cluster is a modified axillary bud, thus indicating the site where a leaf primordium was formed.
- If the leaf left behind was developmentally very young, both the axillary bud and roots grew out only on the leaf side.
- In most species, removal of the shoot apex allows axillary buds to grow out due to a phenomenon called apical dominance.
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Syllabification: ax·il·lar·y bud
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