Osmundastrum cinnamomeum (Linnaeus) C. Presl. Cinnamon Fern. Phen: Mar-May. Hab: Bogs, peatlands, pocosins, wet savannas, floodplains, blackwater stream swamps, marshes, and other wetlands, less typically in merely mesic or even dry-mesic forests, especially if seasonally sub-irrigated. Dist: NL (Labrador) west to MN, south to s. FL, c. TX; Mexico south through Central America to Uruguay and Argentina in South America; West Indies; e. Asia.

Origin/Endemic status: Native

Taxonomy Comments: The species also occurs in e. Asia, where sometimes treated as a separate variety (but the combination is not available in Osmundastrum); these disjunct populations are genetically distinct (Metzgar et al. 2008). The taxonomic significance of the densely glandular pubescent Osmundastrum cinnamomeum var. glandulosum (Waters) McAvoy needs additional evaluation; it is reported from scattered locations in e. North America, including SC and VA. Because of its geographic incoherence it is here regarded as a form.

Synonymy: = Ar, FoC, NE, Tn, TxFerns, Va, Bomfleur, Grimm, & McLoughlin (2015), Bomfleur, Grimm, & McLoughlin (2017), Metzgar et al (2008), Sylvestre, Costa, & Arana (2022); = Osmunda cinnamomea L. – ETx1, Fl1, FNA2, G, Il, Meso1, Mo1, Pa, RAB, S13, Sf, Tx, W, WH3, WV; > Osmunda cinnamomea L.; > Osmunda cinnamomea L. var. cinnamomea – C, F, K1, Tat; > Osmunda cinnamomea L. var. frondosa A.Gray – Tat; > Osmunda cinnamomea L. var. glandulosa Waters – F, K1; > Osmundastrum cinnamomeum (L.) C.Presl var. cinnamomeum – K3, K4, NY, Arana & Ponce (2015), McAvoy (2011); > Osmundastrum cinnamomeum (L.) C.Presl var. glandulosum (Waters) McAvoy – K3, K4, McAvoy (2011)

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