Bidens polylepis Blake. Common name: Midwestern Tickseeed-sunflower. Phenology: Aug-Oct (-Nov). Habitat: Marshes, wet meadows, ditches, bogs. Distribution: DE, MD, IL, and MO south to GA, AL, FL (?), and TX (and adventive farther north); the pre-Columbian distribution is uncertain, and portions of the eastern range of the species may be only from expansion from a more midwestern distribution.

Origin/Endemic status: Native

Synonymy ⓘ: = C, FNA21, G, GrPl, GW2, Il, Mi, NE, NY, Oh3, Ok, Pa, RAB, S, SE1, Tat, Tn, Va, W; < Bidens aristosa (Michx.) Britton — Ar, K4, NcTx; > Bidens polylepis Blake var. polylepis — F, Sherff & Alexander (1955); > Bidens polylepis Blake var. retrorsa Sherff — F, Sherff & Alexander (1955). Basionym: Bidens polylepis Blake 1922 "Urbasionym:" Coreopsis involucrata Nutt. 1834

Links to other floras: = Bidens polylepis - FNA21

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FACW (taxonomic split from wetland indicator species)
• Great Plains: FACW (taxonomic split from wetland indicator species)
• Midwest: FACW (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily ⓘ: 8