Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Acorus americanus (Raf.) Raf. image
Photographer: Dennis W. Woodland           
Family Acoraceae
Acorus americanus (Raf.) Raf.
Acorus: the Latin akoron was the Greek name of an iris
americanus: for America
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, emergent semi-aquatic, up to 6' tall; sweet spicy smell when crushed; very long, aromatic, reddish rhizomes
Flower: yellow to brown, tiny, 6-parted; inflorescence a 2"-4" dense, thick, cylindrical spadix protruding from the side of the leaf-like spathe; blooms June-July
Fruit:brown, hard, and dry with 2-3 seeds
Leaf:sweetly aromatic, crowded at the base, long, narrow, sword-like, midvein and 1-5 additional veins mostly equally-raised
Habitat: shallows, ponds, marshes, in water less than 20" deep; in wet, silty soil

More Information Natural Communities Herbarium Specimens
All Acorus list Google- Images or Text

Flora of North America (off site)
Acorus calamus auct. non L.
Acorus calamus L. var. americanus (Raf.) H.Wulff
Acorus calamus L. var. americanus Raf.

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