Habitat: Small White Lady’s-Slipper was previously found in open tall-grass prairies, dry hillsides and prairies with calcium carbonate (calcareous) deposits. Agricultural practices and human development have reduced the range of the species. Today it is found in prairie openings, wooded grasslands, marshy areas and calcareous sandy loam soil with southern exposure. Small White Lady’s-Slipper is shade intolerant and therefore requires good sun exposure.

The Orchid family is equipped with special devices to ensure cross-fertilization. Orchids rely on insects for pollination. Only a few types of insects (mainly bees) can fit into the flower structure. Once inside the orchid’s pouch, they can only exit in one direction. The pollen rubs onto the insects back while leaving the flower. This prevents the insect from self-pollinating the plant.

Life Cycle: Many stems can grow from one rhizome and each stem produces one or two flowers. In Manitoba, flowering begins around late May or early June. Small White Lady’s-Slipper takes approximately 13 years to flower.

Each capsule contains a few thousand minute seeds which are usually shed by late July. Seed production can be reduced by cool temperatures. The seeds are resistant to wetting and have a dry storage of at least eight years.

Orchids have an obligatory relationship with a certain type of fungus. The attachment of the correct fungus to the root provides additional nutrients and water gathering capability. This extended root system is required for survival.

Limiting Factors and Recovery Needs: Loss of habitat is the major factor causing the decline of Small White Lady’s-Slippers. Most native tall-grass prairie has been broken for agriculture and urban development. Today, only fragments of land remain untouched.

Fire control is believed to contribute to the decline of the species since fire reduces vegetative competition. Small White Lady’s-Slipper is shade intolerant. Fire makes good seed bed conditions by releasing nutrients into the soil and opening up areas to more sunlight.

Many of the remaining populations of Small White Lady’s-Slipper grow on private land, making protection difficult. Lands protected by conservation groups are often visited by collectors seeking to add the flower to their collections. Picking the plant or taking the seeds reduces the possibility of them expanding the population through natural reproduction. Similarly, Small White Lady’s-Slipper should not be transplanted. They should be left in their natural habitat for the enjoyment of present and future generations.

The Small White Lady’s-Slipper needs protected habitat on suitable sites in order to make a recovery. Additional research is needed to fully understand the species needs and requirements

Location: In the United States, Small White Lady’s-Slipper’s historic range consisted of Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Missouri, Nebraska, New Jersey, New York, North Dakota, Ohio, Pennsylvania, South Dakota and Wisconsin. 
Today, Minnesota has the largest population of Small White Lady’s-Slipper plants

This plant is very rare in the state of Iowa
The above plant was photographed on a private prairie in central Iowa..