Abstract
THE æstivation of the corolla of a flower of the family Malvaceae is distinctly twisted (contorted) in bud, the condition generally persisting even after the opening of the flower. A striking peculiarity of the æstivation is that in about half the number of flowers of any plant of any species of this family, the petals are twisted clockwise and the rest in a counter-clockwise fashion. The family comprises 1,200 species1 or more2.
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References
Porter, C. L., Taxonomy of Flowering Plants (W. H. Freeman and Co., San Francisco, 1959).
Lawrence, G. H. M., Taxonomy of Vascular Plants (Macmillan Co., New York, 1963).
Rendle, A. B., The Classification of Flowering Plants, 2, Dicotyledons (Camb. Univ. Press, 1959).
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Eichler, Blütendiagramme, 2, Fig. 115 A, 1878 (original not seen).
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DAVIS, T. Æstivation in Malvaceae. Nature 201, 515–516 (1964). https://doi.org/10.1038/201515a0
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DOI: https://doi.org/10.1038/201515a0
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