Acanthus_montanus
Acanthus montanus
Species of flowering plant
Acanthus montanus, also known as bear's breech or mountain thistle and in Igbo; ogwu_ahga (in Agbani, Enugu State Nigeria) is a species of flowering plant in the genus Acanthus. It is native to tropical Africa, growing in wet and shady places like stream borders[1] in Sierra Leone in West Africa and from Benin to Chad, Zambia, and Angola in central Africa.[2]
It is a thinly branched perennial with basal clusters of oblong to lance-shaped glossy, dark green leaves reaching up to 12 inches (30 cm) long. The leaves have silver marks, wavy margins and thorns. It reaches up to 6 feet (1.8 m) tall and about 24 inches (61 cm) wide. Spikes of pale pink flowers appear summer to fall.[3]
In cultivation it prefers shady situations and occasional deep watering, but tolerates sunny, dry situations too. Its aggressive roots make this plant well suited to slopes.[3]