Iris lacustris

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Iris lacustris
Dwarf Lake Iris.jpg
Conservation status

Vulnerable (NatureServe)
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Asparagales
Family: Iridaceae
Subfamily: Iridoideae
Tribe: Irideae
Genus: Iris
Species: I. lacustris
Binomial name
Iris lacustris

Iris lacustris (Dwarf lake iris), is a beardless rhizomatous iris (genus Iris, subgenus Limniris) native to the Great Lakes region of eastern North America.[1]


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.

It is found in many US states including Ohio.[2]

I. lacustris grows on alvar limestone barrens.[3] 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.[4]


In 1998 I. lacustris was designated the state wildflower of Michigan,[5] where the vast majority of populations exist.[6]

It is designated a vulnerable threatened species by federal, state and provincial laws throughout its distribution range.[7]

See also[edit]


  1. ^ "Center for Plant Conservation". Center for Plant Conservation. Retrieved 2012-05-14. 
  2. ^ Tom S. Cooperrider, Allison Cusick, John T. Kartesz (Editors) Catalogue of the Vascular Plants of Ohio &pg=PA92 agWRx_4tfLoC , p. 92, at Google Books
  3. ^ "Ontario Wildflowers". Ontario Wildflowers. Retrieved 2012-05-14. 
  4. ^ Gary L. Hannan; Michael W. Orick; Gary L. Hannan; Michael W. Orick (2000). "Isozyme Diversity in Iris cristata and the Threatened Glacial Endemic I. Lacustris (Iridaceae)". American Journal of Botany 87 (3): 293–301. doi:10.2307/2656625. JSTOR 2656625. PMID 10718990. 
  5. ^ "Michigan State Wildflower". Retrieved 2012-05-14. 
  6. ^ "Michigan Natural Features Inventory" (PDF). Retrieved 2012-05-14. 
  7. ^ "The Nature Conservancy". 2009-02-02. Retrieved 2012-05-14. 

External links[edit]

Data related to Iris lacustris at Wikispecies