This is the form of Trillium that most people think of when the word Trillium is mentioned, the original 'Wake Robin'. Rigid stems reach up to 35 cms high on established clumps although it may reach up to 45 cms in congested situations. Usual trifoliate leaves rising from underground rhizomes can be quite rhombic in shape. Flowers are a variably but rich red in colour, outward facing and very much held erect above the foliage. The petals are pointed, narrow and have prominent vein markings, each lasting several weeks.