Acorus Linnaeus. Calamus, Sweetflag.
A genus of 3-4 species, perennial herbs, widespread in north temperate and subtropical regions.
Ref: Grayum (1987); Haines (2000); Simmons et al. (2020); Spaulding et al. (2019); Thompson (2000a) In Flora of North America Editorial Committee (2000). Show full citations.
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© Gary P. Fleming | 
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© Toby Y, some rights reserved (CC BY), uploaded by Toby Y | Acorus gramineus source | Original Image ⭷