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Acorus americanus (Rafinesque) Rafinesque. American Calamus, Sweetflag. Phen: May-Jun. Hab: Marshes, wet meadows, other wet areas, limey seeps. Dist: NS west to AK, south to n. NJ, DC (allegedly), c. OH, c. IN, c. IL, IA, NE, MT, ID, and WA.

Origin/Endemic status: Native

Taxonomy Comments: This species is apparently a fertile diploid.

Other Comments: Because this species has not generally been recognized in floras, its distribution is poorly known; additional distributional records should be expected and sought.

Synonymy ⓘ: = AqW, FNA22, Il, K1, K3, K4, Mi, NE, NY, Pa; < Acorus americanus (Raf.) Raf. – W; < Acorus calamus L. – C, F, G, GrPl, GW1, NeUS, Tat

Links to other floras: = Acorus americanus - FNA22

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Great Plains: OBL
  • Midwest: OBL
  • Northcentral & Northeast: OBL

Heliophily ⓘ: 9

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image of plant© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷

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