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Why was Martellidendron separated from the genus Pandanus?

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Screw pine (Pandanus tectorius) — Pandanales Screw pine (*Pandanus tectorius*)

The genus Martellidendron was separated from the genus Pandanus because molecular studies demonstrated that it is genetically distinct from Pandanus. In addition to these molecular findings, researchers determined that the two genera are also morphologically separable.1