Aulacocalyx subulata is a species of flowering plant in the family Rubiaceae. It is a shrub or tree with white flowers and green fruits. The species is native to Gabon, and was described in 1970.
Taxonomy Aulacocalyx subulata was first described in 1970, by Nicolas Hallé, as a variety of Aulacocalyx lujae. In 1997, Estrela Figueiredo placed it as a distinct species.
Two subspecies are recognised: Aulacocalyx subulata subsp. glabra Aulacocalyx subulata subsp. subulata
Distribution Aulacocalyx subulata is native to the wet tropical biome of Gabon. It grows in forests.
Description Aulacocalyx subulata is a shrub or tree that grows up to high. The branchlets are striped.
The leaves are elliptical to lanceolate or oblanceolate, long, wide, and may be slightly asymmetrical. The upperside is dark green, and the underside is paler. The leaf stems are long.
The inflorescences grow on stems, and have two to eleven flowers. The calyx tube is long. The hypanthium is shorter than the calyx tube. The corolla tube is wider at the top, creamy to white in colour, and long. The corolla has five lobes, which are long, and wide.
The fruits are round, green, and wide. The fruits turn black when dry. The seeds are around long, around wide, and black when dry.
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