Acorus americanus (Rafinesque) Rafinesque ssp. americanus. Common name: American Calamus, Sweetflag. Phenology: May-Jun. Habitat: Marshes, wet meadows, other wet areas, limey seeps. Distribution: NS west to AK, south to n. NJ, DC (allegedly), c. OH, c. IN, c. IL, IA, NE, MT, ID, and WA. Because this species has not generally been recognized in floras, its distribution is poorly known; additional distributional records should be expected and sought.
Origin/Endemic status: Native
Taxonomy Comments: This species is apparently a fertile diploid. Sennikov et al. (2024) distinguish an Asian subspecies, Acorus americanus ssp. triqueter (Turczaninow ex Schott) D.D. Sokoloff, M.V.Remizowa, & Sennikov
Synonymy ⓘ: = POWO, Sokoloff et al (2024); = Acorus americanus (Raf.) Raf. — AqW, Can, FNA22, Il, K4, Mi, NE, NS, NY, Pa; < Acorus americanus (Raf.) Raf. — W; < Acorus calamus L. — C, F, G, GrPl, GW1, NeUS, Tat. Basionym: Acorus calamus L. var. americanus Raf. 1828
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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© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Erik Danielson source | Original Image ⭷
© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Nate Martineau, some rights reserved (CC BY-NC), uploaded by Nate Martineau source CC-BY-NC, permission granted to NCBG | Original Image ⭷Feedback
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