Genus: Acanthus
Genus description:
Robust perennial herbs or small shrub.Stems simple, terete, erect.Leaves mostly basal, pinnatifid to pinnatesect.Flowers in dense, terminal, cylindrical spikes.Bracts large, spinose-dentate; bracteoles entire, lanceolate to linear.Calyx 4-lobed; upper and lower lobes large, the lateral small.Corolla 1-lipped (upper lip absent), 3-lobed; tube short.Stamen 4, included; anthers 1-celled, connate in pairs.Fruit a capsule.
Species and images:
