Acrosynanthus minor is a species of flowering plant in the family Rubiaceae. It is a shrub native to Cuba.

The species was named by Ignatz Urban in 1923.

Distribution Acrosynanthus minor is native to the seasonally dry tropical biome of Eastern Cuba.

Description Acrosynanthus minor is a branching shrub. The leaves are broadly linear to oblong-linear in shape, long, and wide. The seed-case is obovate, long, and deep.

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