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Asclepias verticillata Linnaeus. Whorled Milkweed. Phen: (Feb-) May-Oct; (Mar-) Jun-Nov (-Dec). Hab: Barrens, thin soils of rock outcrops (especially mafic or calcareous rocks), prairies, open woodlands, longleaf pine sandhills, pine flatwoods, road and powerline rights-of-way. Dist: E. MA west to ND and MB, south to s. FL, TX, NM, and AZ.

Origin/Endemic status: Native

Taxonomy Comments: Southern Florida material needs study. Several semicryptic taxa are likely included here currently.

Synonymy: = Ar, C, F, Fl5, FNA14, G, GrPl, Il, K1, K3, K4, Mi, Mo2, NcTx, NE, NY, Ok, Pa, RAB, S, Tat, Tn, Tx, Va, W, WH3, Woodson (1954)

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACU
  • Eastern Mountains and Piedmont: FACU
  • Great Plains: FACU
  • Midwest: FACU
  • Northcentral & Northeast: UPL

Heliophily: 8

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image of plant© Will Stuart | Original Image ⭷
image of plant© Floyd A. Griffith | Original Image ⭷
image of plant© Sonnia Hill | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Grant Morrow Parkins | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Grant Morrow Parkins | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷

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