Range and Habitat in Illinois
The native Yellow Lady's Slipper is an uncommon plant that is widely scattered across Illinois (see Distribution Map). It is less common than formerly, but still persists in colonies of variable size at several sites. Habitats include moist to dry deciduous woodlands, sandy woodlands and savannas, thinly wooded bluffs along rivers, wooded slopes, and forested bogs. The size of local populations can increase in response to fallen trees from windstorms, or occasional wildfires, as this reduces excessive shade from woody vegetation. Some authorities regard this orchid as a native variety of Cypripedium calceolus, which occurs in Eurasia. Under this system of classification, its scientific name is Cypripedium calceolus pubescens. Faunal Associations
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