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Silphium laciniatum Linnaeus. Compass-plant. Phen: Jun-Sep. Hab: Prairies, limestone barrens, calcareous glades, also sometimes cultivated (including outside of its native distribution). Dist: S. ON, MI. WI, s. MN, and e. SD south to se. TN, s. AL, c. MS, s. LA, c. TX, and n. NM. Populations discovered at outlying sites to the east (Chester Co. VA, Chain Bridge in Washington DC in the 1880s, etc.) are ambiguous as to nativity (R. Wright, pers. comm. 2012).

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, C, FNA21, G, GrPl, K3, K4, Mi, NcTx, NY, Oh3, SE1, Tn, Tx; = n/a – Pa; > Silphium laciniatum L. var. laciniatum – F, Il, K1, Perry (1937); > Silphium laciniatum L. var. robinsonii L.M.Perry – F, Il, K1, Perry (1937)

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Heliophily ⓘ: 9

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image of plant© Paul Marcum source | Original Image ⭷
image of plant© Paul Marcum source | Original Image ⭷
image of plant© Paul Marcum source
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Paul Marcum source
image of plant© Aidan Campos source
image of plant© Paul Marcum source
image of plant© Paul Marcum source | Original Image ⭷
image of plant© Paul Marcum source
image of plant© Paul Marcum source
image of plant© Paul Marcum source
image of plant© Paul Marcum source
image of plant© Paul Marcum source

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