Blooms in early spring; needs some winter chill. Each stem is topped with a whorl of three leaves; a single three-petaled flower appears in the center of the whorl (sometimes on a stalk, sometimes virtually stalkless). Plant in shady, woodsy site. Left undisturbed, plants will gradually increase by rhizomes. Dies to ground in mid- to late summer.Trillium chloropetalum
Native to California.To 1–1 1/2 ft. high and 1 ft.wide, with 6-in.-long leaves mottledin maroon. Stalkless flowershave greenish white toyellowish petals about 2 1/2 in.long. T. c. giganteum has deepmaroon petals.Trillium grandiflorum
Native to the eastern United States. Grows to 1 1/2 ft. tall, 1 ft. wide, with stout stems and 2 1/2- to 6-in.-long leaves. Nearly stalkless flowers are nodding, to 3 in. across, white aging to rose. There are several choice double-flowered forms.Trillium ovatum
Western native. Resembles T. grandiflorum but has narrower petals; flowers are usually upright and are borne on stalks.
Native to western Canada and mountainous parts of western U.S. To 15–20 ft. tall, spreading by r...
Native to Russia, northern China. Grows 50 ft. tall, 40 ft. wide. Smooth dark green leaves are 3/4 to ...
Native to Brazil. Open-headed, fast-growing, nearly evergreen tree to 20–25 ft. tall, 30 ft. wid...