Hypericum sphaerocarpum Michaux. Section: Myriandra. Common name: Barrens St. John's-wort, Roundfruit St. John's-wort. Phenology: Jun-Sep. Habitat: Limestone glades and barrens, prairies. Distribution: 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, Can, F, FNA6, G, GrPl, K4, Mi, Mo2, NcTx, NS, Pa, POWO, 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
Links to other floras: = Hypericum sphaerocarpum - FNA6
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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Horticultural Information
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