*Acorus calamus Linnaeus. Phen: May-Jun. Hab: Marshes, wet meadows, other wet areas. Dist: Native of Eurasia, now widespread in e. North America.
Origin/Endemic status: Eurasia
Taxonomy Comments: Populations of A. calamus in our area are apparently sterile triploids introduced from Europe, though diploid and tetraploid populations of A. calamus are known from Asia.
Other Comments: The aromatic rhizome and leaves have been used medicinally and candied as a confection.
Synonymy: = Ar, ETx1, FNA22, Il, K1, K3, K4, Mi, Mo1, NcTx, NE, NY, Ok, Pa, Tx, Va, Spaulding et al (2019); < Acorus americanus (Raf.) Raf. – W; < Acorus calamus L. – C, F, G, GrPl, GW1, NeUS, RAB, S