Vascular Plants of North Carolina
Account for Creeping St. John's-wort - Hypericum adpressum   W.P.C. Barton
Members of Hypericaceae:
Members of Hypericum with account distribution info or public map:
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Section 6 » Order Theales » Family Hypericaceae
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AuthorW.P.C. Barton
DistributionFormerly collected at a couple of sites in the extreme northwestern corner of the Coastal Plain and the adjacent Piedmont, in Halifax and Northampton counties. It is of historical occurrence in the state, with the last record in 1958. Sadly, no one alive has ever seen the species in NC.

Despite its limited range in NC, it has a quite wide range across the eastern US but is rare everywhere. It ranges north to MA and MI, and south to southern GA and AR. However, there are only a handful of county records in each of the 20 states where it has been found.
AbundanceHistorical only; considered extirpated. However, as there are current records north and south of the state (in VA and SC), we can hope that someone will re-find it in the state, as suitable habitat appears to be present. Why this species is so scarce across its large range is a complete mystery; it must have more exacting habitat requirements than thought. This is a State Species Concern species.
HabitatThis species occurs in wet depressions, “boggy” areas, opening in marshes and swamps, and other sunny wet grounds. It seems to favor isolated, non-flowing, non-connected wetlands.
See also Habitat Account for General Broadleaf Herbaceous Mires
PhenologyBlooms and fruits in July and August.
IdentificationThis is a colonial, perennial herb that grows to about 2 feet tall, typically in moderate stands, usually in shallow water. The leaves are dark green, shiny, and lanceolate to narrowly elliptic, with revolute margins and a sunken mid-vein, to about 2 inches long. It has numerous 5-petaled yellow flowers that are about 2/3-inch across. The species, as with many St. John’s-worts, could be easily overlooked when not in bloom. However, if you see a colony of yellow, 5-petaled flowers growing on low plants in shallow water, it is worth checking out. There is no obvious reason why the species should be completely gone forever in NC. It is currently still considered extant in GA, SC, VA, and TN –- the four states that surround NC.
Taxonomic CommentsNone

Other Common Name(s)Bog St. John’s-wort
State RankSH
Global RankG3
State StatusSC-H
US Status
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