Often, the stem surface of mature London plane trees is bumpy. It has been hypothesized, that this condition could indicate inner defects. Our results, derived from a thorough characterization of the stem surface, tomography, and thermography, do not show such correlation.
Further reading
Wilms L, Rust S (2015) Zusammenhang zwischen der äußeren Form des Stammes und seinem inneren Zustand bei Platane. In: Dujesiefken D (ed.) Jahrbuch der Baumpflege. Haymarket Media, Braunschweig, pp 302–306.