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
Show parent genus | Show parent in key(s)
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: OBL
- Great Plains: OBL
- Midwest: OBL
- Northcentral & Northeast: OBL
Heliophily ⓘ: 9
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.
© 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
See something wrong or missing on about Acorus americanus ssp. americanus? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months. If a species is not keyed, that's because keying is ongoing. Please don't send us feedback about unkeyed species.
Horticultural Information
Intro:
Stems:
Leaves:
Inforescence:
Flowers:
Fruits:
Comments:
Height:
plant sale text:
bloom table text:
description:
stems:
leaves:
inflorescence:
flowers:
fruits:
comments:
cultural notes:
germination code:
native range:
0 unsaved edits on this page.