The Large-Flowered Trillium is a member of the Lily Family
(Liliaceae) that has all of its flower parts and leaves in threes. The flower blooms on an erect stalk that rises from the center of the swirl of 3 leaves. The bloom is a large (2-4 inches across) creamy white that turns pink as the flower ages. The petals are of course three in number and large with wavy edges. It grows in Rich woods and thickets and blooms from April to June, depending on the weather, to a height of 8-18 inches.
The above example was taken in a deep wood in mid-April. Usually by early May the flowers are gone here. They are found from Ontario, Quebec and Western Maine south to Georgia, west to Arkansas and north to Minnesota.