Kandelia (Rhizophoraceae) has long been regarded as a monotypic mangrove genus. Recent studies in chromosome number, molecular phylogeography, physiological adaptation, and leaf anatomy, however, reveal that there are two well differentiated sets of geographical populations separated by the South China Sea. These are recognized as two distinct species, Kandelia candel (L.) Druce and Kandelia obovata Sheue, Liu & Yong sp. nov.
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Sheue et al. (2003) studied this question.
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