Pedicularis densiflora, known commonly as Warrior's Plume, is a plant of the lousewort genus in the broomrape family. It is a perennial herb with stout, green or sometimes reddish or magenta stems and fern-shaped leaves, and long spikes of deep red to bright pink flowers with toothed petals. Like others of its genus, it is a root parasite, attaching to the roots of other plants to obtain nutrients and water. This species is a facultative parasite, or hemiparasite, in that it can live without attaching to another plant but will parasitize if presented with the opportunity. It often parasitizes plants of the heath family, such as manzanita. Warrior's Plume is native to California and Oregon in western North America and is found in forests and woodlands at low elevation.