Family | Scientific Name | Common Name | Habitat | Distribution | Image |
Hypericaceae | Hypericum adpressum | Bog St. John's-wort, Creeping St. John's-wort | Boggy depressions. | E. MA south to sw. GA in the Coastal Plain; disjunct inland in e. WV (Greenbrier County), IN, IL, and sc. TN. Records from the Kentucky Coastal Plain (Ballard and McCracken counties) were based on misidentified specimens (T. Littlefield, pers.comm., 2021). See discussion on its habitats and rarity in Sorrie (1998b). | 
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Hypericaceae | Hypericum androsaemum | Sweet-amber, Tutsan | Old fields, disturbed areas (commonly cultivated). | Native of Eurasia. Reported for e. MD (Longbottom, Naczi, & Knapp 2016). | 
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Hypericaceae | Hypericum apocynifolium | | Mesic bluffs and ravines, ridges and natural levees in floodplains. | C. GA, s. GA, and Panhandle FL west to se. AR and e. TX. | 
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Hypericaceae | Hypericum boreale | Dwarf St. John's-wort, Northern St. John's-wort | Sinkhole ponds in the Mountains, interdune ponds in the outer Coastal Plain, boggy places. | NL (Newfoundland) and QC west to w. ON, south to VA, nw. NC (?), OH, IN, and n. IL. | 
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Hypericaceae | Hypericum brachyphyllum | | Ponds and wet pine flatwoods. | Se. SC south to n. FL, west to s. MS and e. LA. | 
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Hypericaceae | Hypericum buckleyi | Granite Dome St. John's-wort | Thin soil in seasonal seepage around rock outcrops, particularly granitic exfoliation domes. | Sw. NC south to nw. SC and ne. GA, a Southern Appalachian endemic. | 
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Hypericaceae | Hypericum calycinum | Aaron’s-beard | Disturbed areas, persistent and rarely naturalized from plantings. | Native of se. Europe and Asia Minor. Naturalized in Knox County, TN (D. Estes, pers. comm., 2012). | |
Hypericaceae | Hypericum canadense | Canada St. John's-wort | Bogs, pine savannas, ditches. | NL (Newfoundland) and QC west to MN, south to s. GA, ne. FL, Panhandle FL, and MS; also in Holland and Ireland, where considered by some to be native | 
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Hypericaceae | Hypericum chapmanii | Apalachicola St. John's-wort, Tree St. John's-wort | Margins of pond-cypress ponds, pond-cypress stringers, often growing with Cyrilla parvifolia and Nyssa ursina. | Endemic to Panhandle FL (11 counties). | |
Hypericaceae | Hypericum cistifolium | | Pine savannas, wet pine flatwoods. | E. NC south to s. FL, west to e. TX. | 
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Hypericaceae | Hypericum crux-andreae | St. Andrew's Cross, St. Peter's-wort | Pine flatwoods, pine savannas, bogs, seeps, mesic to dryish forests and woodlands. | NY (Long Island) and NJ south to s. FL, west to e. TX, primarily on the Coastal Plain, but scattered inland to w. NC and n. GA, also north in the interior to c. TN, s. KY, c. AR, and se. OK. | 
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Hypericaceae | Hypericum cumulicola | Highlands Scrub St. John’s-wort | Florida scrub. | Endemic to c. peninsular FL (Highlands and Polk counties). | 
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Hypericaceae | Hypericum densiflorum | Mountain Bushy St. John's-wort | Bogs, streambanks, dry to moist forests, rock outcrops, moist forests, pine savannas. | Sw. PA south to n. GA and c. AL in and near the Mountains; NY (Long Island) and NJ south to SC in the Coastal Plain; s. GA west to AL in the Coastal Plain. | 
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Hypericaceae | Hypericum denticulatum | Strict St. John's-wort | Wet pine savannas, wet pine flatwoods, adjacent ditches, borrow scrapes, blackwater stream shores. | Se. NY (Long Island) and s. NJ south to e. GA (McIntosh County) (Sorrie 1998b) on the Coastal Plain; disjunct inland in c. and w. NC, sc. TN, and in s. AL. | 
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Hypericaceae | Hypericum dissimulatum | Deceptive St.-John's-wort | Saturated sandy or peaty soils. | ME south to se. VA. | 
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Hypericaceae | Hypericum dolabriforme | Glade St. John's-wort | Limestone glades and barrens. | In nw. GA (Jones & Coile 1988) and e. TN (Chester, Wofford, & Kral 1997); this species should be sought in sw. VA. | 
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Hypericaceae | Hypericum drummondii | Drummond's St. John's-wort, Nits-and-lice | Dry woodlands, woodland borders, fields. | MD west to OH, IL, and se. KS, south to Panhandle FL and c. TX. | 
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Hypericaceae | Hypericum edisonianum | Edison’s St. John’s-wort | Flatwoods ponds, Florida prairies, wet pine flatwoods. | Endemic to c. and s. peninsular FL (Polk, Highlands, DeSoto, Glades, and Collier counties). | 
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Hypericaceae | Hypericum ellipticum | Pale St. John's-wort | Swamp forests, wet places along streams, wet meadows. | NL (Newfoundland) and NS west to w. ON, south to NY, DE, MI, and MN, and in the mountains to WV, NC (?), and ne. TN (Johnson County) (Chester, Wofford, & Kral 1997), and NC (?). The documentation for Cronquist’s (1991) attribution of H. ellipticum to NC is unknown. | 
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Hypericaceae | Hypericum erythreae | Georgia St. John's-wort, Sparse-leaved St. John’s-wort, Grit St. John’s-wort | Seepage bogs, roadside ditches. | Apparently nearly endemic to the Altamaha Grit region of the GA Coastal Plain, extending to Beaufort County, SC (Allison 2011). See https://www.inaturalist.org/observations/89825586 for potential occurrence in Seminole County, GA. | 
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Hypericaceae | Hypericum exile | | Pine flatwoods. | Endemic to Panhandle FL (Bay, Franklin, Gulf, Liberty, and Washington counties). | 
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Hypericaceae | Hypericum fasciculatum | Peelbark St. John's-wort | Wet pine savannas, beaver ponds, upland depression ponds. | E. NC south to s. FL, west to s. MS and e. LA. | 
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Hypericaceae | Hypericum frondosum | Golden St. John's-wort, Cedar Glade St. John's-wort | Rock outcrops and rocky woodlands; also in dry disturbed areas. | S. IN and KY south to GA, AL, and e. MS; W. LA and e. TX. | 
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Hypericaceae | Hypericum galioides | | Wet pine savannas, wet pine flatwoods, pools, edges of bottomlands. | Se. VA (Isle of Wight County) and e. NC south to c. peninsular FL, west to s. AR and se. TX. | 
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Hypericaceae | Hypericum gentianoides | Pineweed, Orange-grass, Orangeweed | Fields, rock outcrops, woodland borders, eroding areas, pond margins, pine flatwoods. | ME and ON west to MN, south to s. FL and TX. | 
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Hypericaceae | Hypericum graveolens | Mountain St. John's-wort | Grassy balds, grassy openings, forests, at high elevations (1200 m or more). | Nw. NC and ne. TN south to sw. NC, a Southern Appalachian endemic. | 
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Hypericaceae | Hypericum gymnanthum | Clasping-leaf St. John's-wort | Pine savannas, wet pine flatwoods, sinkhole ponds (Augusta and Rockingham counties, VA), other wet to moist habitats. | S. NJ south to ne. FL, Panhandle FL, west to c. TX, and scattered inland in PA, WV, sc. TN, OH, IN, IL, MO, and e. KS; also disjunct in Guatemala (introduced?). Added to the flora of KY in 2013 by Martina Hines (Littlefield 2014). | 
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Hypericaceae | Hypericum harperi | Harper's St. John's-wort | Clay-based Carolina bays, other upland depression ponds, with Taxodium ascendens. | E. and c. SC south to sw. GA and e. Panhandle FL and se. AL. | 
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Hypericaceae | Hypericum humifusum | Trailing St. John's-wort | Waif from horticultural use. | Native of w. Europe. | 
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Hypericaceae | Hypericum hypericoides | St. Andrew's Cross | Dry forests and woodlands. | NJ, w. VA, c. KY, se. MO, and c. OK, south to s. FL and e. TX; West Indies; Mexico south to n. Central America. | 
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Hypericaceae | Hypericum interior | Interior Bushy St. John's-wort | Rocky forests, riverbanks, seeps, especially over limestone or dolostone. | Sw. VA, e. and c. TN, nw. GA south to c. AL. | 
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Hypericaceae | Hypericum limosum | Cuban St. John's-wort | Calcareous savannas and flatwoods. | Peninsular FL; w. Cuba. | 
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Hypericaceae | Hypericum lissophloeus | | Margins of sinkhole ponds. | Endemic to Panhandle FL (Bay and Washington counties). | 
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Hypericaceae | Hypericum lloydii | Lloyd's St. John's-wort | Dry woodlands, longleaf pine sandhills, edges of granitic flatrocks, edges of Altamaha Grit outcrops, roadbanks. | Sc. VA (Sorrie & LeBlond 2008) south to c. AL, mainly in the lower Piedmont and upper Coastal Plain. | 
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Hypericaceae | Hypericum lobocarpum | Five-lobe St. John’s-wort | Mesic prairies, pine flatwoods, stream banks, river scour; also roadsides and ditches through these habitats. | C. KY, c. TN (Chester, Wofford, & Kral 1997) and s. MS west to s. IL, se. OK, and e. TX. Credited to SC by Robson (1996), based on specimens debated and dismissed by Adams (1973). The basis for attribution of H. lobocarpum to "Blue Ridge, N.C." by Small (1933) is unknown. | 
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Hypericaceae | Hypericum majus | | Wet meadows and shores. | NL (Newfoundland) west to BC, south to s. NJ, n. DE, nw. PA (Rhoads & Block 2007), OH, IN, IL, MO, OK, CO, and OR (Kartesz 1999). | 
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Hypericaceae | Hypericum microsepalum | Flatwoods St. John’s-wort | Moist to wet pine flatwoods. | S. GA and se. AL (Houston County) south to Panhandle FL. | 
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Hypericaceae | Hypericum mitchellianum | Blue Ridge St. John’s-wort | Grassy balds, grassy openings, forests, seepages, at moderate to high elevations (generally at 1000-1900 m or more). | W. VA, e. WV, and e. TN south to sw. NC, a Southern Appalachian endemic. | 
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Hypericaceae | Hypericum mutilum var. latisepalum | Southern Dwarf St. John’s-wort | Marshes and other wet habitats. | Se. SC south to s. FL, west to TX. Fernald (1950) considers this taxon to be north to NJ. | 
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Hypericaceae | Hypericum mutilum var. mutilum | Common Dwarf St. John’s-wort | Bogs, fens, marshes, shores, other wet habitats. | NL (Newfoundland) and QC west to MB, south to s. FL and c. TX; scattered (probably as an adventive) farther west in North America, in Mexico, Central and South America, and Europe. | 
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Hypericaceae | Hypericum myrtifolium | Myrtle-leaf St. John’s-wort | Ponds. | Se. SC south to s. FL, west to se. MS, a Southeastern Coastal Plain endemic. Small (1933) reported this species from SC; this distribution is now documented by a specimen from Jasper Co., SC (P. McMillan, pers. comm.). | 
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Hypericaceae | Hypericum nitidum | | Usually in flowing water of blackwater streams. | C. SC south to Panhandle FL, west to sw. AL. | 
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Hypericaceae | Hypericum nudiflorum | | Streambanks, moist forests, swamps. | Se. VA south to Panhandle FL, west to e. TX, s. AR, and se. OK; disjunct in Cumberland Plateau of TN. | 
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Hypericaceae | Hypericum paucifolium | Few-flowered St. John's-wort | Dry prairies on sand. | Se. TX south to ne. Mexico. | 
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Hypericaceae | Hypericum perforatum | European St. John’s-wort, Klamath-weed | Fields, pastures, roadsides, woodland borders. | Native of Europe. See Duncan (1985) for documentation for GA. | 
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Hypericaceae | Hypericum prolificum | Shrubby St. John’s-wort | Bogs, seepages, dry rocky forests, rock outcrops, riverside prairies. | NY west to s. MI and MN, south to GA, LA, and e. TX. | 
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Hypericaceae | Hypericum pseudomaculatum | Large Spotted St. John’s-wort | Wet, moist, or dry forests and fields. | SC south to Panhandle FL, west to TX, north in the interior to e. TN (?), c. IL, s. MO, and c. OK. {records east of the Ozarks need to be studied more carefully} | 
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Hypericaceae | Hypericum punctatum | Spotted St. John's-wort | Fields, woodland borders. | QC west to MN, south to c. peninsular FL and e. TX. | 
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Hypericaceae | Hypericum pyramidatum | American Great St. John's-wort | Swamps, bottomlands, wet meadows. | QC west to MN, south to s. PA (Rhoads & Klein 1993; Rhoads & Block 2007), MD (Robson 2000; but excluded based on no specimen), and WV (Harmon, Ford-Werntz, & Grafton 2006). | 
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Hypericaceae | Hypericum radfordiorum | Radfords' St. John's-wort, Brushy Mountain St. John’s-wort | Shallow circumneutral soil mats of granitic domes in the Brushy Mountains. | Endemic to the Brushy Mountains of Alexander and Wilkes counties, NC. | 
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Hypericaceae | Hypericum setosum | Hairy St. John’s-wort | Pine savannas, wet pine flatwoods, boggy areas, adjacent ditches, fireplow lines, and scrapes. | Se. VA south to c. peninsular FL, west to se. TX. | 
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Hypericaceae | Hypericum species 2 | | Wet loamy longleaf pine savannas. | Endemic to wet pine savannas in the outer Coastal Plain of NC. | |
Hypericaceae | Hypericum sphaerocarpum | Barrens St. John's-wort, Roundfruit St. John's-wort | Limestone glades and barrens, prairies. | 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). | 
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Hypericaceae | Hypericum stragulum | Low St. John’s-wort, Straggling St. John’s-wort | Dry rocky or sandy woodlands. | MA (Nantucket Island), NY (Long Island), west to s. PA, s. OH, s. IN, s. IL, c. MO, se. KS, and c. OK, south to ne. NC, c. SC, c. GA, n. AL, n. MS, n. LA, and c. TX. | 
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Hypericaceae | Hypericum suffruticosum | Pineland St. John's-wort | Pine savannas and flatwoods. | Se. NC south to c. peninsular FL, west to se. LA. | 
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Hypericaceae | Hypericum tenuifolium | Sandhill St. John's-wort | Pine flatwoods, pine savannas, longleaf pine sandhills. | Se. NC south to s. peninsular FL; Panhandle FL and se. AL. | 
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Hypericaceae | Hypericum tetrapetalum | | Wet pinelands and in depressional wetlands (open or dominated by Taxodium ascendens). | E. GA (within a few counties of se. SC), south to s. FL, west to Panhandle FL; Cuba. Reports from SC are based on misidentifications (K. Bradley, pers.comm., 2021). | 
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Hypericaceae | Hypericum virgatum | Coppery St. John’s-wort | Hardpan woodlands, rock outcrops, woodland borders, glades and barrens (especially over mafic or ultramafic rocks). | MD west to s. OH, s. IN, and s. IL, south to c. NC, c. SC, sw. GA, Panhandle FL, s. MS, and se. LA. | 
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