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HENDERSON, A. and RUSTIAMI, H. 2019. New species of <em>Calamus</em> (Arecaceae; Calamoideae; Calaminae) from Sumatra. Phytotaxa. 415, 3 (Aug. 2019), 117–129. DOI:https://doi.org/10.11646/phytotaxa.415.3.1.