Symphyotrichum expansum (Poeppig ex Sprengel) Nesom. Phenology: Jul-Nov (-Jan). Habitat: Pond margins, disturbed wet areas. Distribution: FL Panhandle and peninsula, AL, OK, UT, NV, and CA south through Mexico and Central America to n. South America; West Indies.
Origin/Endemic status: Native
Taxonomy Comments: Dahal, Siniscalchi, & Folk (2023) separated a new species, S. mexicanum, endemic to Mexico, from the concept of S. expansum.
Synonymy ⓘ: = Dahal, Siniscalchi, & Folk (2023); = Symphyotrichum subulatum (Michx.) G.L.Nesom var. parviflorum (Nees) S.D.Sundb. — FNA20, Sundberg (2004); > Aster subulatus Michx. var. australis Shinners; < Symphyotrichum expansum (Poepp. ex Spreng.) G.L.Nesom — Fl7, K4, Mex, WH3, Nesom (1994b), Nesom (2005b); Erigeron expansus Poeppig — (basionym)
Links to other floras: = Symphyotrichum subulatum var. parviflorum - FNA20
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: OBL
- Great Plains: OBL
- Midwest: OBL
Heliophily ⓘ: 9
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