Hypericum harperi R. Keller. Common name: Harper's St. John's-wort. Phenology: Jul-Sep. Habitat: Clay-based Carolina bays, other upland depression pond, with Taxodium ascendens. Distribution: E. and c. SC south to sw. GA and e. Panhandle FL and se. AL.

ID notes: The flowers of H. denticulatum, H. erythreae, H. harperi, H. radfordiorum, and H. virgatum are rotate (with petal curved to the right when looking down on the flower from above) and with a somewhat coppery yellow.

Origin/Endemic status: Endemic

Taxonomy Comments: H. harperi should be sought in sc. and se. NC, where it may well occur. This species has generally been considered a part of H. denticulatum or H. virgatum, but Webb (1980) makes a convincing argument for its recognition, including the ecological differentiation and absence of intermediates or hybrids when growing in proximity to H. denticulatum. See H. virgatum for additional discussion.

Synonymy ⓘ: = Fl2, FNA6, K4, NS, POWO, WH3, Allison (2011), Robson (2006); < Hypericum acutifolium Elliott — S; < Hypericum denticulatum Walter — GW2; < Hypericum denticulatum Walter var. acutifolium (Elliott) Blake — RAB, Adams (1973); < Hypericum harperi R.Keller. Basionym: Hypericum harperi R.Keller 1923

Links to other floras: = Hypericum harperi - FNA6

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily ⓘ: 9