Salvia purpurea, also known as Salvia mexicana, is a perennial herb of Salvia in Labiatae. The plant is tall, with quadrangular stems and opposite leaves. The whole plant is hairy, the sepals are covered with long purple fluff, the inflorescence is long, and the flowers are purplish red, which is very beautiful. This species has strong adaptability, late flowering, easy cultivation and easy reproduction, and is a flower border plant suitable for popularization.