Aulacocalyx caudata 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 west Africa.
Aulacocalyx caudata was first described in 1877, and moved to its current genus in 1958. It is listed as of Least Concern by the IUCN.
Taxonomy The species was first described by William Philip Hiern in 1877, and placed in the genus Randia. In 1958, Ronald William John Keay moved the species to the genus Aulacocalyx.
The holotype was collected in Spanish Guinea (now Equatorial Guinea).
Distribution The species is native to the wet tropical biomes of Cameroon, Equatorial Guinea, Gabon, and Nigeria. It grows in primary, secondary, and riverine forests, and on mountain slopes at elevations of up to . Its area of occurrence is estimated to be .
Description Aulacocalyx caudata is a shrub or tree that grows high.
The leaves are long, wide, elliptical to ovate, and light green to brown when dry. The leaves grow on stems.
The inflorescences grow on stems, and usually have two to three flowers. The flowers are fragrant and white. The calyx tube is long, and green. The corolla is long, and white. The corolla has five elliptical lobes, which are long, and wide.
The fruits are round, long, green, and black when dry. The seeds are around long, around wide, and black when dry.
Conservation In 2018, the IUCN assessed Aulacocalyx caudata as of Least Concern. The species faces no significant threats. The population is large and stable.
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