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Monoecious tree. Leaves distichous, penninerved, with infrequent laticifers. Petals 4 in the ♂, 6-8 in the ♀, connate to an urceolate tube for the lower ¾, free above in form of 4 lobes. Ovary rudimentary. Ovary pyramidal, 1-celled, with 2 (unitegmic or naked?) ovules pendent from the short basal placenta; Fruit drupaceous, concrescent with the much enlarged calyx below; Seed 1, containing exclusively oil;


Asia-Tropical:, Borneopresent; Malaya (Peninsular Malaysiapresent); Sumatera (Sumaterapresent)
Monotypic. Indochina; in Malesia: Sumatra, Malay Peninsula, and Borneo. .


BAILL. - in Hist. Pl. 1892: 452
SLEUM. - in E. & P., Nat. Pfl. Fam., ed. 2, 16b. 1935: 30
BAILL. - in Blumea. 1980: 153