Silphium laciniatum Linnaeus. Common name: Compass-plant. Phenology: Jun-Sep. Habitat: Prairies, limestone barrens, calcareous glades, also sometimes cultivated (including outside of its native distribution). Distribution: S. ON, MI. WI, s. MN, and e. SD southward through 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, K4, Mi, NcTx, NY, Oh3, SE1, Tn, Tx; = n/a — Pa; > Silphium laciniatum L. var. laciniatum — F, Il, Perry (1937); > Silphium laciniatum L. var. robinsonii L.M.Perry — F, Il, Perry (1937). Basionym: Silphium laciniatum L. 1753
Links to other floras: = Silphium laciniatum - FNA21
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Heliophily ⓘ: 9
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Horticultural Information
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native range: eastern & central North America
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