First described in by Scottish botanist William Aiton , C. Give bright dappled shade or morning sun. Its roots are typically within a few inches of the top of the soil. The Showy Lady's Slipper is a popular plant among orchid collectors for its color and structure. Additionally, all other soil additives must be devoid of any calcium that could buffer the pH to above 5.
States are colored green where the species may be found. Pink Lady's slipper Cypripedium acaule. Photo courtesy of Susan Trull, U. Pink lady's slipper is a large, showy wildflower belonging to the orchid family. It has two opposite basal leaves with conspicuous parallel veins and a large flower at the end of an erect stalk. The flower is magenta to whitish-pink; sometimes the whitish pink flowers will have darker pink venation. Rarely the flower may be all white. This plant grows 6 to 15 inches tall and flowers generally between May and July.
Another common name for this plant is moccasin flower. There is even evidence that it is partially myco-heterotrophic by parasitizing fungus that attempts to invade its roots. However, above pH 5 the soil microbes become more than acaule can manage and the plants rot. Seedlings germinated in a sterile environment can grow and thrive in a much higher pH than 5, but must be grown below 5 if removed from the sterility.
For artificial cultivation container culture is a must, and the growing medium must be naturally acidic. Additionally, all other soil additives must be devoid of any calcium that could buffer the pH to above 5.
High quality peat moss or pine duff work well, and pH neutral perlite can be added to improve porosity. Due to the risk of calcium bicarbonate, tap water is unsuitable. Give bright dappled shade or morning sun. Sink pots in winter or store in a cold frame for insulation. Given these conditions C. Cypripedium acaule can be found in the eastern third of the United States , particularly in the Great Lakes Region and the Northeast , south along the Appalachians to Alabama.
It is widespread in Canada , where it is found in every province except British Columbia. It also occurs in the Northwest Territories and in St. It is usually found in pine forests, where it can be seen in large colonies, but it also grows in deciduous woods. It was long speculated that a fungus association was needed for growth,  and that acaule could not be artificially cultivated outside of these associations.
However, a greater understanding of orchids in general has shown that this association is only needed to germinate orchid seeds, and is not required once plants begin making true leaves. Royal Botanic Gardens, Kew.
Government of Prince Edward Island. Retrieved 4 June Retrieved 19 April Retrieved 15 May An online encyclopedia of life, Version 6. Fundamentals of Orchid Biology. Information on Uses, Doses, and Side Effects". Secrets of Native American herbal remedies: Retrieved from " https: Articles with 'species' microformats.
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