Hypericum adpressum - Raf. ex W. Bart.
Creeping St. John's-wort
Other Common Names: creeping St. Johnswort
Taxonomic Status: Accepted
Related ITIS Name(s): Hypericum adpressum Raf. ex W. Bart. (TSN 21424)
Unique Identifier: ELEMENT_GLOBAL.2.132006
Element Code: PDCLU03010
Informal Taxonomy: Plants, Vascular - Flowering Plants - St. John's-Wort Family
Image 10876

© New York Natural Heritage Program

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Theales Clusiaceae Hypericum
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Hypericum adpressum
Taxonomic Comments: Distinct species.
Conservation Status
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NatureServe Status

Global Status: G3
Global Status Last Reviewed: 29Apr2010
Global Status Last Changed: 11Oct2002
Rounded Global Status: G3 - Vulnerable
Reasons: This species' range includes most of the eastern portion of the United States, but populations are widely scattered across that range. It is not common in any state, and has been extirpated or possibly extirpated in at least 5 states. The species has a specific habitat preference (seasonal, ground water-driven depressional wetlands); this habitat is sensitive to disturbance and is frequently threatened by draining and filling for agriculture and development. Recent droughts in the southeast have also caused declines in habitat availability and quality there.
Nation: United States
National Status: N3

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Arkansas (S1), Connecticut (SH), Delaware (S2), Georgia (S1), Illinois (S1), Indiana (S1), Kentucky (SH), Maryland (S1), Massachusetts (S2), Michigan (S1), Missouri (S1), New Jersey (S1), New York (S2), North Carolina (SH), Pennsylvania (SX), Rhode Island (S2), South Carolina (S2), Tennessee (S1), Virginia (S1), West Virginia (SH)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Scattered distribution in isolated wetlands, primarily on the Atlantic coastal plain from Georgia to southeastern Massachusetts. Especially spotty distribution in the southern portion of the range; more concentrated from New Jersey north. Several disjunct populations in the Midwest, mostly Illinois.

Area of Occupancy: 126-2,500 4-km2 grid cells
Area of Occupancy Comments:  

Number of Occurrences: 21 - 80
Number of Occurrences Comments: Approximately 75-80 occurrences are presumed extant rangewide, scattered over 15 states. An additional 60-65 occurrences are believed historical or extirpated.

Population Size Comments: Defining an "individual" in the field can be difficult for this rhizamatous perennial. However, best estimates suggest that several populations of 1000+ flowering plants exist.

Number of Occurrences with Good Viability/Integrity: Some (13-40)
Viability/Integrity Comments: Approximately 25 occurrences are believed to have excellent or good viability. A few occurrences have not yet been assessed for viability, so it is possible that there may be a few more than this.

Overall Threat Impact: Very high - medium
Overall Threat Impact Comments: Alteration of pond hydrology is the primary threat to this species; attempts to drain the ponds and depressions where it occurs are frequent. Recreational use of shorelines is also an issue. In South Carolina (and likely some other nearby states as well), ephemeral wetlands, especially depressions, are severely threatened by the recent 20-30 year drought cycle - these droughts have led to lowered water tables and the seeding in of loblolly, sweet gum, and in some cases slash pine (B. Pittman pers. comm. 2010).

Short-term Trend Comments: Extirpated from some states and declining in others, in general populations in the Northeast appear to be healthy and stable. Populations in the Southeast appear to be declining somewhat due to recent drought impacts on ephemeral wetlands, especially depressions (B. Pittman pers. comm. 2010).

Long-term Trend: Decline of 30-50%
Long-term Trend Comments: Habitat has experienced non-trivial reduction from its historical extent, but loss is probably not greater than 50%.

Intrinsic Vulnerability Comments: Appears to be less dependent on fluctuating water levels than coastal plain pondshore annuals.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Scattered distribution in isolated wetlands, primarily on the Atlantic coastal plain from Georgia to southeastern Massachusetts. Especially spotty distribution in the southern portion of the range; more concentrated from New Jersey north. Several disjunct populations in the Midwest, mostly Illinois.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AR, CT, DE, GA, IL, IN, KY, MA, MD, MI, MO, NC, NJ, NY, PAextirpated, RI, SC, TN, VA, WV

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
AR Prairie (05117), Saline (05125)
CT New London (09011)*
DE Sussex (10005)
GA Dougherty (13095), Irwin (13155), Lee (13177)*, Screven (13251)*, Sumter (13261)
IL Cass (17017)*, Iroquois (17075), Kankakee (17091), Will (17197)
IN Daviess (18027), Gibson (18051)*, Jasper (18073), Knox (18083)*, Lake (18089)*, Porter (18127)*
KY Ballard (21007)*, Carlisle (21039)*, McCracken (21145)*
MA Barnstable (25001), Nantucket (25019)
MD Caroline (24011), Dorchester (24019), Garrett (24023)*, Queen Annes (24035), Somerset (24039), Wicomico (24045)
MI Newaygo (26123)
MO Mississippi (29133)*, Scott (29201)
NC Halifax (37083)*, Northampton (37131)*
NJ Atlantic (34001)*, Bergen (34003)*, Burlington (34005)*, Camden (34007)*, Cape May (34009), Cumberland (34011)*, Gloucester (34015), Mercer (34021)*, Salem (34033)
NY Nassau (36059)*, Queens (36081)*, Suffolk (36103)
PA Allegheny (42003)*, Bucks (42017)*
RI Providence (44007)*, Washington (44009)
SC Barnwell (45011), Clarendon (45027), Hampton (45049)*, Jasper (45053)*, Richland (45079)*, Saluda (45081)
TN Coffee (47031)*, Marion (47115), Robertson (47147)*, Sumner (47165)*, Warren (47177)*
VA Greensville (51081), Sussex (51183)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Lower Connecticut (01080205)+*, Cape Cod (01090002)+, Blackstone (01090003)+*, Pawcatuck-Wood (01090005)+, Shetucket (01100002)+*
02 Lower Hudson (02030101)+*, Hackensack-Passaic (02030103)+*, Northern Long Island (02030201)+*, Southern Long Island (02030202)+, Crosswicks-Neshaminy (02040201)+*, Lower Delaware (02040202)+*, Delaware Bay (02040204)+*, Cohansey-Maurice (02040206)+, Broadkill-Smyrna (02040207)+, Great Egg Harbor (02040302)+, Chincoteague (02040303)+, Chester-Sassafras (02060002)+, Choptank (02060005)+, North Branch Potomac (02070002)+*, Western Lower Delmarva (02080109)+, Eastern Lower Delmarva (02080110)+
03 Roanoke Rapids (03010106)+*, Lower Roanoke (03010107)+*, Nottoway (03010201)+*, Meheriin (03010204)+, Saluda (03050109)+, Congaree (03050110)+*, Lake Marion (03050111)+, Salkehatchie (03050207)+, Broad-St. Helena (03050208)+*, Brier (03060108)+*, Lower Savannah (03060109)+*, Calibogue Sound-Wright River (03060110)+*, Alapaha (03110202)+, Kinchafoonee-Muckalee (03130007)+, Ichawaynochaway (03130009)+
04 Little Calumet-Galien (04040001)+*, Pere Marquette-White (04060101)+
05 Lower Allegheny (05010009)+*, Youghiogheny (05020006)+*, Barren (05110002)+*, Lower Wabash (05120113)+*, Lower White (05120202)+, Collins (05130107)+*, Red (05130206)+*, Lower Ohio (05140206)+*
06 Middle Tennessee-Chickamauga (06020001)+, Upper Elk (06030003)+*, Upper Duck (06040002)+*, Lower Tennessee (06040006)+*
07 Kankakee (07120001)+, Iroquois (07120002)+, Chicago (07120003)+*, Lower Illinois (07130011)+*, Whitewater (07140107)+*
08 Lower Mississippi-Memphis (08010100)+*, Bayou De Chien-Mayfield (08010201)+*, New Madrid-St. Johns (08020201)+, Little River Ditches (08020204)+*, Lower White (08020303)+, Upper Saline (08040203)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A perennial herb, usually with a single, erect stem, 3-8 dm tall. Leaves are linear-oblong to narrowly elliptic, tapering to the base, revolute (with rolled-under margins). Produces terminal clusters of yellow flowers from early July to September.
Reproduction Comments: Presumably dispersed by waterfowl, as seeds are small (but larger than dust-sized).
Ecology Comments: It is possible that the species' limited distribution is driven by dispersal limitation rather than habitat limitation.
Palustrine Habitat(s): HERBACEOUS WETLAND, Riparian, TEMPORARY POOL
Habitat Comments: Seasonally saturated to flooded acidic sands and peat of shores/margins of freshwater ponds, swales, wet meadows, and depressions; also sometimes occurs in analogous anthropogenic habitats such as wet railroad ditches. This species is a heliophyte that requires open sites. A preferred (though rare) habitat appears to be natural depression wetlands with fluctuating water levels, where this species occurs in the area between low and high water.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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Author: MANHESP
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 11Oct2002
NatureServe Conservation Status Factors Author: Enser, R.; rev. C. Annable (1992), rev. B. McAvoy/K. Maybury (1996), minor rev. K. Gravuer (2010)

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Clemants, Steven and Carol Gracie. 2006. Wildflowers in the Field and Forest. A Field Guide to the Northeastern United States. Oxford University Press, New York, NY. 445 pp.

  • Crow, Garrett E. and C. Barre Hellquist. 2000. Aquatic and Wetland Plants of Northeastern North America: A revised and enlarged edition of Norman C. Fassett's a Manual of Aquatic Plants. Volume One: Pteridophytes, Gymnosperms, and Angiosperms: Dicotyledons. The University of Wisconsin Press. Madison, Wisconsin. 536 Pages.

  • Deam, C. C. 1940. Flora of Indiana. Division of Forestry, Dept. of Conservation, Indianapolis, Indiana. 1236 pp.

  • Duncan, W.H., and J.T. Kartesz. 1981. Vascular Flora of Georgia: An annotated checklist. Univ. Georgia Press, Athens. 143 pp.

  • Enser, Richard W. 2000. Hypericum adpressum Barton, Creeping St. John's-wort. New England Plant Conservation Program Conservation and Research Plan. New England Wild Flower Society, Framingham, MA 01701.

  • Fernald, M.L. 1950. Gray's manual of botany. 8th edition. D. Van Nostrand, New York. 1632 pp.

  • Gleason, H.A., and A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. New York Botanical Garden, Bronx, New York. 910 pp.

  • Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

  • Godfrey, R.K., and J.W. Wooten. 1981. Aquatic and wetland plants of southeastern United States: Dicotyledons. Univ. Georgia Press, Athens. 933 pp.

  • Harvill, A.M., T.R. Bradley, C.E. Stevens, T.F. Wieboldt, D.M.E. Ware, D.W. Ogle, G.W. Ramsey, and G.P. Fleming. 1992. Atlas of the Virginia fora. Virginia Botanical Associates, Burkeville, Virginia. 144 pp.

  • Holmgren, Noel. 1998. The Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York.

  • Hough, M. Y. 1983. New Jersey Wild Plants. Harmony Press, Harmony, New Jersey. 414 pp.

  • Hough, M.Y. 1983. New Jersey wild plants. Harmony Press, Harmony, NJ. 414 pp.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Mohlenbrock, R.H., and D.M. Ladd. 1978. Distribution of Illinois vascular plants. Southern Illinois Univ. Press, Carbondale, IL. 282 pp.

  • New York Natural Heritage Program. 2010. Biotics database. New York Natural Heritage Program. New York State Department of Environmental Conservation. Albany, NY.

  • Radford, A. E., H. E. Ahles, and C. R. Bell. 1968. Manual of the Vascular Flora of the Carolinas. University of North Carolina Press, Chapel Hill. 1183 pp.

  • Rhoads, A.F., and W.M. Klein, Jr. 1993. The vascular flora of Pennsylvania: Annotated checklist and atlas. American Philosophical Society, Philadelphia, PA. 636 pp.

  • Schwegman, J.E. 1991. New records for Illinois vascular plants. Erigenia 11:9-12

  • Sutter, R.D., V. Frantz, and K.A. McCarthy. 1988. Atlas of rare and endangered plant species in North Carolina. North Carolina Dept. Agriculture, Plant Protection Section, Conservation Program, Raleigh, North Carolina. 174 pp.

  • Svenson, H. K., and R.W. Pyle. 1979. The Flora of Cape Cod: an annotated list of the ferns and flowering plants of Barnstable County, Massachusetts. The Cape Cod Museum of Natural History, Cape Cod, Massachusetts. 139 pp.

  • Swink, F., and G. Wilhelm. 1994. Plants of the Chicago Region. Morton Arboretum. Lisle, Illinois.

  • THE NATURE CONSERVANCY - MD FIELD OFFICE. 1994. PRISTINE PINES - HYPERICUM ADPRESSUM ANNUAL MONITORING: TABLE OF DATA 1992-1994.

  • Tatnall, R.R. 1946. Flora of Delaware and the Eastern Shore: an annotated list of the ferns and flowering plants of the peninsula of Delaware, Maryland, and Virginia. Soc. Nat. Hist. Del. 313 pp.

  • Weldy, T. and D. Werier. 2010. New York flora atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research http://www.fccdr.usf.edu/. University of South Florida http://www.usf.edu/]. New York Flora Association http://wwws.nyflora.org/, Albany, New York

  • Zaremba, Robert E. 1991. Corrections to phenology list of April 9, 1991.

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