Acanthus guineensis is a species of flowering plant in the genus of Acanthus. It is native to Western Tropical Africa to Congo. This species grows primarily in wet tropical biomes.
It is a unbranched shrub growing up to 2 meters tall, commonly found in high-forest regions. It is similar in appearance to Acanthus montanus. The bracts have 5 to 9 spines, with two lateral spines forming the terminal pair. Bracteoles bear 1âÂÂ2 spines and are up to 7 mm wide. Upper sepals measure 40âÂÂ51 mm long and 9âÂÂ12 mm wide, while lower sepals are 26âÂÂ35 mm long. The corolla upper part is generally white, pale yellow, or occasionally pale pink, with yellow-green veins.
In Sierra Leone, its boiled fruits are traditionally used to relieve children's coughs. Its flowers are also used for ornamental purposes.