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Vernonia gigantea (Walter) Trelease ex Branner & Coville. Common Ironweed, Giant Ironweed. Phen: Late Aug-Oct; Aug-Nov. Hab: Pastures, bottomlands, streamsides, moist thickets, roadsides, disturbed wet or dry sands. Dist: W. NY, s. MI and e. NE south to SC, FL, and TX.

Origin/Endemic status: Native

Synonymy: = Ar, GrPl, Mi, NcTx, NY, Pa, Tn, Va, W; = n/a – Tat; = Vernonia altissima Nutt. – G, RAB, Tx, WV; = Vernonia gigantea (Walter) Trel. ssp. gigantea – K1, Mo2, Oh3, SE1, Urbatsch (1972); = Vernonia gigantea (Walter) Trel. var. gigantea – C; > Vernonia altissima Nutt. – S; > Vernonia altissima Nutt. var. altissima – F; > Vernonia altissima Nutt. var. taeniotricha S.F.Blake – F; < Vernonia gigantea (Walter) Trel. ex Branner & Coville – Fl7, FNA19, K3, K4, WH3; > Vernonia gigantea (Walter) Trel. ex Branner & Coville – S; > Vernonia gigantea (Walter) Trel. var. gigantea – Il; > Vernonia gigantea (Walter) Trel. var. taeniotricha – Il, nomen nudum

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Wetland Indicator Status:

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

Heliophily ?: 8

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image of plant© Eric Keith, some rights reserved (CC BY-NC), uploaded by Eric Keith source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Eric Keith, some rights reserved (CC BY-NC), uploaded by Eric Keith source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward source CC-BY | Original Image ⭷
image of plant© Janet Wright, some rights reserved (CC BY-NC), uploaded by Janet Wright source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Janet Wright, some rights reserved (CC BY-NC), uploaded by Janet Wright source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Janet Wright, some rights reserved (CC BY-NC), uploaded by Janet Wright source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Scott Ward, some rights reserved (CC BY), uploaded by Scott Ward source CC-BY | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Joey Shaw source | Original Image ⭷
image of plant© Joey Shaw source | Original Image ⭷
image of plant© J.W. Hardin | Original Image ⭷

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