flameflower \flameflower\, flame flower \flame flower\n. 1. a plant of the genus {Kniphofia} having long grasslike leaves and tall scapes of red or yellow drooping flowers. Syn: kniphofia, tritoma. [WordNet 1.5] 2. plant of the Southwestern U. S. with fleshy roots and erect stems with narrow succulent leaves and one reddish-orange flower in each upper leaf axil. Its fleshy roots were once cooked by Indians. [WordNet 1.5]