Distribution
I. lacustris is found on northern shores and smaller islands of Lake Michigan and Lake Huron, on the Door Peninsula of Wisconsin, and on the Bruce Peninsula and Manitoulin Island in Ontario, Canada.
I. lacustris grows on alvar limestone barrens. It is a close relative to Iris cristata (Dwarf crested iris), the only other crested iris native to North America. However, unlike it, I. lacustris is found only in small areas of the Great Lakes region that have been glacier-free for only 11,000 years.
Read more about this topic: Dwarf Lake Iris
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