any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower

[ Syn: trillium , wood lily ]

common American spring-flowering woodland herb having sheathing leaves and an upright club-shaped spadix with overarching green and purple spathe producing scarlet berries

[ Syn: jack-in-the-pulpit , indian turnip , arisaema triphyllum , arisaema atrorubens ]