Trollius laxus
Trollius laxus is a rare, herbaceous perennial only found in a small range of fens or wetland habitats fed by groundwater in northeastern United States. In these calcium rich fens, the T. laxus can be locally abundant. They can also be found in Oregon, Washington, British Columbia and the Rocky Mountains of Colorado. During spring, T. laxus is one of the first flowers to bloom in the Rocky Mountain. Its distribution is limited by light intensity and hydrology.