(Liliaceae/Trilliaceae). Trinity flower, Wood Lily, Wake robin. Genus of about 30 species of rhizomatous, deciduous perennials occurring mainly in woodland and scrub in North America with a few species in the W. Himalayas and N. E. Asia. 3 lance-shaped, net veined, often silver or purple marbled leaves. Upright or nodding, terminal, solitary, funnel or cup shaped flowers with whorls of 3 leaf-like, often reflexed outer sepals and 3 inner petals, often with striking dark centres. Bloom in mid/late spring. Provide cool, moist, but well-drained soil with a neutral to acidic pH. Plant in part to full shade - excellent for woodland gardens or moist shady borders.