Bidens bidentoides - (Nutt.) Britt.
Maryland Bur-marigold
Other English Common Names: Delmarva Beggarticks
Other Common Names: Delmarva beggarticks
Taxonomic Status: Accepted
Related ITIS Name(s): Bidens bidentoides (Nutt.) Britton (TSN 35715)
Unique Identifier: ELEMENT_GLOBAL.2.145335
Element Code: PDAST18070
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Bidens
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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: Bidens bidentoides
Conservation Status
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NatureServe Status

Global Status: G3G4
Global Status Last Reviewed: 21Apr2009
Global Status Last Changed: 28Dec2005
Rounded Global Status: G3 - Vulnerable
Reasons: Regional endemic known in fresh water tidal marshes, at least 70 populations are known; threatened by development but able to colonize disturbed habitats.
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 Delaware (SH), Maryland (S3.1), New Jersey (S2), New York (S3), Pennsylvania (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: NY (Hudson River), NJ (Burl, Camden, Cumberland, Salem, and Mercer counties), MD (Upper Chesapeake Bay); DE (Newcastle County); PA (Delaware River).

Area of Occupancy: 26-500 4-km2 grid cells
Area of Occupancy Comments: Many of the large marsh populations occupy multiple hectares.

Number of Occurrences: 21 - 300
Number of Occurrences Comments: Approximately 70 populations extant, maybe more; 26 in New York, 11 in DE, 17 in MD, 9 in NJ, 9 in PA.

Population Size Comments: Occurs by the thousands at some sites; only a few plants at the others.

Number of Occurrences with Good Viability/Integrity: Few to some (4-40)
Viability/Integrity Comments: Many of the populations in the Hudson River and Chesapeake Bay number into the thousands.

Overall Threat Impact Comments: Threatened by dredging, filling, pollution, and development. While this species may be locally threatened by various waterfont development projects, it seems to be able to survive in somewat degraded habitats. In some areas, invasive plants such as Phragmites and purple loosestrife may be a threat (NYNHP 2009). Other threats include shoreline erosion due to boating, hardening of the shoreline, and possibly sea level rise in the future (NYNHP 2009).

Short-term Trend: Relatively Stable (<=10% change)
Short-term Trend Comments: Populations seem to be stable along the Hudson River (NYNHP 2009). More plants are being discovered in New York. This plant seems to have the ability to colonize old rip-rap and abandoned piers. It does best on the front edge of a pristine marsh, but is also found scattered throughout marsh communities. In Pennsylvania, it appears to be declining due to development.

Long-term Trend: Decline of <30% to increase of 25%
Long-term Trend Comments: In New York, populations have probably fluctuated greatly in the past, but have recovered as habitats have become more natural (NYNHP 2009). In Pennsylvania, much of the habitat has likely been destroyed. Its range has become constricted in the Delaware estuary due to habitat destruction and possibly water pollution (Schuyler 1990).

Intrinsic Vulnerability Comments: Has the ability to colonize new sites and tolerate a broad range of conditions.

Environmental Specificity: Moderate. Generalist or community with some key requirements scarce.
Environmental Specificity Comments: A species of fresh water tidal marsh.

Other NatureServe Conservation Status Information

Distribution
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Global Range: NY (Hudson River), NJ (Burl, Camden, Cumberland, Salem, and Mercer counties), MD (Upper Chesapeake Bay); DE (Newcastle County); PA (Delaware River).

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 DE, MD, NJ, NY, PA

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
DE New Castle (10003)*
NJ Burlington (34005), Camden (34007), Cumberland (34011), Gloucester (34015)*, Mercer (34021), Middlesex (34023)*, Salem (34033)*
NY Albany (36001), Columbia (36021), Dutchess (36027), Greene (36039), Putnam (36079), Rensselaer (36083), Ulster (36111)
PA Bucks (42017), Delaware (42045), Philadelphia (42101)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
02 Middle Hudson (02020006)+, Rondout (02020007)+, Hudson-Wappinger (02020008)+, Raritan (02030105)+*, Crosswicks-Neshaminy (02040201)+, Lower Delaware (02040202)+, Brandywine-Christina (02040205)+*, Cohansey-Maurice (02040206)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Estuarine Habitat(s): Tidal flat/shore
Habitat Comments: Freshwater tidal flats in the mud along river edges.
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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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: 20Sep2005
NatureServe Conservation Status Factors Author: Weldy, T. and L. Oliver (rev. 2005), rev. A. Tomaino & NE Grank workshop (2009)

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.

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

  • 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.

  • 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.

  • Mitchell, Richard S. and Charles J. Sheviak. 1981. Rare Plants of New York State. Bull No. 445. New York State Museum. Univ. of New York. State Ed. Department Albany, NY.

  • New York Natural Heritage Program. 2009. Conservation Guide for Bidens bidentoides. Online. Available: http://www.acris.nynhp.org/report.php?id=8750 (accessed 22 June 2009).

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

  • Reschke, Carol. 1990. Ecological communities of New York State. New York Natural Heritage Program, New York State Department of Environmental Conservation. Latham, NY. 96 pp. plus xi.

  • SCHUYLER, A.E. AND W.E. FERREN. 1975. A NEW INTERTIDAL FORM OF ELEOCHARIS OLIVACEA (CYPERACEAE). BARTONIA 43:46-48.

  • Schuyler, A. E. 1990. Element Stewardship Abstract for Bidens bidentoides. Stewardship Abstract No. 001. State of New Jersey Department of Environmental Protection and Energy Division of Parks and Forestry. [http://www.njparksandforests.org/natural/heritage/textfiles/bidenbi.txt]

  • 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

  • Weldy, Troy W. and David Werier. 2005. New York Flora Atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research. University of South Florida]. New York Flora Association, Albany, NY. Available on the web at (http://atlas.nyflora.org/).

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