Coefficient of Conservatism:
Coefficient of Wetness:
Moist to rather dry deciduous forests, most luxuriant and often forming large colonies in rich beech-maple forest, but also, less frequently, found in oak-hickory or aspen forests, swamps and thickets, mixed conifer-hardwoods, and even coniferous swamps. Apparently very local in Houghton and Keweenaw Cos. and Isle Royale—a single collection seen from each of these areas.
The petals tend to turn pink with age; in other species, the color, whether white, maroon, or intermediate, appears to be more constant from the bud to maturity.
Forms with the petals variegated with green are not uncommon and are sometimes locally abundant. In extreme cases, parts of the flower are sometimes changed toward more leaf-like states, and are sometimes multiplied in number. Petioled leaves often occur on plants with abnormal flowers. Most of these variants result from a phytoplasma infection; the disease spreads and plants die after several years.