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Leaf extension rate in continuous (A and B) vs. rhythmic (C) growth and structure of the resulting stems (modified from Hallé et al., 1978). (A) Constant leaf extension in a theoretical case (i.e. several palm trees) and (B) fluctuations in the leaf extension rate of Rhizophora mangle correlated with climatic fluctuations. (C) Rhythmic cumulative rate of leaf extension in Hevea brasiliensis. G.U., growth unit; f, leaf; ca, cataphyll.
