trillium recurvatum(n = noun.plant) prairie trillium, prairie wake-robin - trillium of central United States having dark purple sessile flowers;
is a kind of trillium, wake-robin, wood lily

dwarf-white trillium, genus trillium, prairie trillium, purple trillium, red trillium, sessile trillium, snow trillium, trillium, trillium erectum, trillium family, trillium sessile