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Hypericum sphaerocarpum Michaux. Barrens St. John's-wort, Roundfruit St. John's-wort. Phen: Jun-Sep. Hab: Limestone glades and barrens, prairies. Dist: C. OH, s. MI, s. WI, IA, and se. NE south through KY, e. and c. TN (Chester, Wofford, & Kral 1997), to nw. GA (GAHP 2003), c. AL, c. MS, LA, and ne. TX; also reported for sw. PA, where considered adventive (Rhoads & Klein 1993).

Origin/Endemic status: Native

Synonymy: = Ar, C, F, FNA6, G, GrPl, K1, K3, K4, Mi, Mo2, NcTx, Pa, Tn, Tx, Adams (1962), Adams (1973), Robson (1996); > Hypericum sphaerocarpon var. sphaerocarpon – Il; > Hypericum sphaerocarpum Michx. – S13; > Hypericum sphaerocarpum Michx. var. turgidum (Small) Svenson – Il; > Hypericum turgidum Small – S, S13

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Wetland Indicator Status:

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

Heliophily ?: 8

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image of plant© Alan Weakley source | Original Image ⭷
image of plant© Paul Marcum source | Original Image ⭷

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