Species Iris Group of North America

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Iris lacustris

Botanical Name: Iris lacustris (added by D. Kramb, 09-MAY-04)

Botanical Synonyms:

Iris cristata var. lacustris (D. Kramb, 09-MAY-04)


Crested (D. Kramb, 09-MAY-04)

Lophiris (D. Kramb, 25-SEP-04)

Common Names:

Great Lakes iris, Dwarf lake iris (D. Kramb, 09-MAY-04)

Chromosome Count:

2n=42 (D. Kramb, 09-MAY-04)

General Description:

Similar to Iris cristata, but with much shorter perianth-tube, and different chromosome number. (D. Kramb, 09-MAY-04)

Flowers are lavender-blue, rarely white, with gold crests and white patch. (D. Kramb, 25-SEP-04)

Distinguishing Features:


Preferred Habitat:

Gravelly shores and cliffs in calcareous soil around Lakes Superior, Michigan, and Huron. (D. Kramb, 09-MAY-04)

No confirmed reports from Lake Superior, but may yet be found there. (Sean Zera, 01-JUN-05)


Estimated Zone 4-7 (D. Kramb, 09-MAY-04)

Native Range:

Found only along the shores of the Great Lakes in USA and Canada. (D. Kramb, 09-MAY-04)

Known from 8 counties in the southern Upper Peninsula and northern Lower Peninsula of Michigan and 2 counties on Wisconsin's Door Peninsula, as well as Manitoulin Island and the Bruce Peninsula in Ontario. (Sean Zera, 01-JUN-05)

Status in the Wild:

Common within its extremely restricted habitat. Designated threatened at the federal and state/province level throughout its range. (Sean Zera, 01-JUN-05)

Commercial Availability:

Rare, sometimes available in SIGNA seed exchange. (D. Kramb, 09-MAY-04)

Sources Cited:

Info entered on 25-SEP-04 comes from the SIGNA Checklist of Iris Species. (D. Kramb, 25-SEP-04)

Most info entered on 01-JUN-05 from Edward Voss' "Michigan Flora Part I" (Sean Zera, 01-JUN-05)

Additional Comments:


Where to buy it:

Joe Pye Weed's Garden

SIGNA member!

Prairie Moon Nursery

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