Abstract
Endogenous adventitious buds develop in situ from dedifferentiated parenchyma cells of the trunk‐bark in the temperate trees Tilia platyphyllos, Acer pseudoplatanus, and Fraxinus excelsior, as well as in the tropical cauliflorous trees Artocarpus integrifolia, Swartzia schomburgkii, and Couroupita guianensis. On aerial roots of Clusia rosea endogenous adventitious buds originate within the proliferated phelloderm beneath lenticels. In Salix alba, Fraxinus excelsior, and Terminalia arjuna, exogenous dormant buds are overgrown during secondary growth and engulfed within the bark tissue, so that they give the impression of apparent endogeny. In the leaf axils of young shoots of Araucaria angustifolia, superficial tissue layers divide and form axillary protrusions, which soon become parenchymatic and partly suberized. A few cells at their bases stay meristematic, however, and develop as rudimentary endogenous bud primordia, which persist in the bark for many years.
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