
Trillium grandiflorum, Photo by Mike Slater
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Trillium grandiflorum Is one of the showiest and best known Trilliums. It is found growing from Quebec and Ontario (where it is the
Provincial Flower
) west to Minnesota and south to the Carolinas. The flowers are pure white which fade to pink and dull red as they get old. Flowers may last more than a week in cool weather. It is not known to hybridize with any other species but it does vary in size due to a number of factors including; age of the plant, genetics, habitat and occasionally disease.

T. grandiflorum f. roseum in cultivation., Photo by Mike Slater
There is a pink flowered form called
rorma rosea which is has pink flowers upon opening.

T. grandiflorum f. roseum in cultivation., Photo by Mike Slater
Notice that the narrow trumpet-like flower shape of T. grandiflorum makes it impossible to see the ovary of the flower when you look into it as compared to the similar appearing flowers of Trillium ovatum
? where the ovary is conspicuous.

T. grandiflorum f. roseum in cultivation., Photo by Mike Slater

T. grandiflorum f. roseum in cultivation., Photo by Mike Slater

T. grandiflorum f. roseum in cultivation., Photo by Mike Slater

T. grandiflorum f. roseum in cultivation., Photo by Mike Slater

T. grandiflorum f. roseum in cultivation., Photo by Jim McClements

T. grandiflorum in cultivation., Photo by Todd Boland

T. grandiflorumin cultivation., Photo by Mike Slater

T. grandiflorum in the wild in Pennsylvania., Photo by Mike Slater