Trillium chloropetalum, also known as giant trillium, giant wakerobin, or common trillium, is a species of flowering plant in the family Melanthiaceae. It is endemic to the western U.S. state of California, being especially frequent in and around the San Francisco Bay Area.
Trillium chloropetalum
Variety chloropetalum with yellowish-green petals (March 17 in Marin County, CA)
Variety giganteum with white petals and reddish-purple anther connective tissue (March 6 in San Mateo County, CA)
With pinkish petals (March 20 in San Mateo County, California)
Trillium is a genus of about fifty flowering plant species in the family Melanthiaceae. Trillium species are native to temperate regions of North America and Asia, with the greatest diversity of species found in the southern Appalachian Mountains in the southeastern United States.
Trillium
Diseased T. grandiflorum with virescent petals, extra petals, and other abnormalities
Trillium grandiflorum (great white trillium)
Ontario trillium emblem on an Ottawa courthouse sign.