Trillium (page 4): "When I woke up I was in a forest. The dark / seemed natural, the sky through the pine trees / thick with many lights."
Family: Melanthiaceae
Type: Herbaceous perennial
Blooming period: early to late Spring
Sun requirement: Partial shade
Soil requirement: Fertile, moist but well-drained, neutral to slightly acidic.
Notes: Trillium have petals, sepals, and leaves that occur in whorls of three. They tend to grow in the forest.
Sources: [1]