Flowers. Kniphofia also called tritoma, is a genus of flowering plants in the family Xanthorrhoeaceae, first described as a genus in 1794. All plants produce spikes of upright, brightly colored flowers well above the foliage, in shades of red, orange and yellow, often bicoloured. The flowers produce copious nectar while blooming and are attractive to bees. In the New World they may attract sap-suckers such as hummingbirds and New World orioles.