Megalodonta beckii - (Torr. ex Spreng.) Greene
Beck's Water-marigold
Other Common Names: Beck's watermarigold
Synonym(s): Bidens beckii Torr. ex Spreng.
Taxonomic Status: Accepted
Related ITIS Name(s): Bidens beckii Torr. ex Spreng. (TSN 509515)
Unique Identifier: ELEMENT_GLOBAL.2.147252
Element Code: PDAST6A010
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Megalodonta
Check this box to expand all report sections:
Concept Reference
Help
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: Megalodonta beckii
Taxonomic Comments: FNA, 2006 (vol. 21) does not recognize distinct varieties and transfers Megalodonta beckii to Bidens beckii.
Conservation Status
Help

NatureServe Status

Global Status: G5
Global Status Last Reviewed: 25Aug2015
Global Status Last Changed: 25Aug2015
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Nation: United States
National Status: NNR
Nation: Canada
National Status: N5 (07Feb2010)

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 Connecticut (S2), Idaho (SNR), Illinois (S1), Indiana (S1), Iowa (S1), Maine (SNR), Maryland (SNR), Massachusetts (S2), Michigan (SNR), Minnesota (SNR), Missouri (SNR), Montana (S2), New Hampshire (S1), New Jersey (S1), New York (S3), Ohio (SH), Oregon (SNR), Pennsylvania (S1), Rhode Island (SNR), Vermont (SNR), Washington (SNR), Wisconsin (SNR)
Canada British Columbia (S3), Manitoba (S3), New Brunswick (S3S4), Nova Scotia (S3), Ontario (S5), Quebec (S3S4), Saskatchewan (S1S2)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Canada- BC, MB, NB, NS, ON, QU, SK. United States- CT, IA, ID, IL, IN, MA, MD, ME, MI, MN, MO, MT, NH, NJ, NY, OH, OR, PA, RI, VT, WA, WI.

Other NatureServe Conservation Status Information

Distribution
Help
Global Range: Canada- BC, MB, NB, NS, ON, QU, SK. United States- CT, IA, ID, IL, IN, MA, MD, ME, MI, MN, MO, MT, NH, NJ, NY, OH, OR, PA, RI, VT, WA, WI.

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 CT, IA, ID, IL, IN, MA, MD, ME, MI, MN, MO, MT, NH, NJ, NY, OH, OR, PA, RI, VT, WA, WI
Canada BC, MB, NB, NS, ON, QC, SK

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CT Fairfield (09001)*, Hartford (09003)*, Litchfield (09005), Middlesex (09007)*, New Haven (09009), New London (09011), Tolland (09013)*, Windham (09015)
IA Cerro Gordo (19033)*, Dickinson (19059), Hancock (19081)*
IL Lake (17097)
IN Fulton (18049)*, Kosciusko (18085), La Porte (18091), Lagrange (18087), Lake (18089)*, Noble (18113)*, Porter (18127), Pulaski (18131)*, Steuben (18151)*, Whitley (18183)*
MA Berkshire (25003), Bristol (25005), Essex (25009), Hampden (25013), Middlesex (25017), Norfolk (25021), Plymouth (25023), Suffolk (25025), Worcester (25027)
MT Flathead (30029), Lake (30047), Lincoln (30053), Missoula (30063)
NH Belknap (33001), Carroll (33003), Cheshire (33005), Grafton (33009), Strafford (33017)
NJ Morris (34027)*, Sussex (34037)
PA Crawford (42039), Erie (42049), Luzerne (42079), Northampton (42095)*, Wyoming (42131)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Piscataqua-Salmon Falls (01060003)+, Merrimack (01070002)+, Nashua (01070004)+, Merrimack (01070006)+*, Miller (01080202)+, Chicopee (01080204)+, Lower Connecticut (01080205)+, Charles (01090001)+, Cape Cod (01090002)+, Blackstone (01090003)+, Narragansett (01090004)+, Quinebaug (01100001)+, Shetucket (01100002)+, Thames (01100003)+, Quinnipiac (01100004)+, Housatonic (01100005)+, Saugatuck (01100006)+*
02 Rondout (02020007)+, Middle Delaware-Musconetcong (02040105)+, Upper Susquehanna-Tunkhannock (02050106)+, Upper Susquehanna-Lackawanna (02050107)+
04 Little Calumet-Galien (04040001)+*, St. Joseph (04050001)+, Chautauqua-Conneaut (04120101)+, Lake Erie (04120200)+*
05 French (05010004)+, Shenango (05030102)+*, Eel (05120104)+*, Tippecanoe (05120106)+*
07 Winnebago (07080203)+*, Upper Iowa (07080207)+*, Kankakee (07120001)+, Upper Fox (07120006)+
10 Little Sioux (10230003)+
17 Yaak (17010103)+, Blackfoot (17010203)+, Flathead Lake (17010208)+, Stillwater (17010210)+, Swan (17010211)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
Help
Basic Description: A submerged aquatic forb with long dissected leaves and solitary, emergent, composite flowers.
Technical Description: An aquatic perennial herb with elongate submersed stems. Leaves 2-4 cm, the submersed ones filliform dissected, the emerged ones simple, sessile, entire to serrate. Flowering heads terminal, solitary the disk about 1 cm wide, rays showy 1-1.5 cm long, outer involucral bracts several, more herbaceous and less striate than the similar inner bracts. Achenes subterete, cartilaginous, truncate, at both ends. Pappus of 3-6 long, rigid, persistent, sharp awns, smooth below, with retrorse barbs at the summit, 10-14 mm long. Receptacle chaffy throughout, flat or nearly so. Corolla evident, yellow. Disk flowers fertile with divided styles.
Diagnostic Characteristics: Receptacles chaffy throughout, flat or nearly so. Corolla evident, yellow. Disk flowers fertile with divided styles. Pappus of three to six awns. Achenes of the disk flowers subterete, not beaked. Bracts of the involucre all separate or nearly so.
Duration: PERENNIAL
Reproduction Comments: Disk flowers perfect, ray flowers neutral. (Rays rarely pistillate).
Ecology Comments: Seeds eaten by wood ducks.
Lacustrine Habitat(s): Shallow water
Economic Attributes Not yet assessed
Help
Management Summary Not yet assessed
Help
Population/Occurrence Delineation Not yet assessed
Help
Population/Occurrence Viability
Help
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
Help
Authors/Contributors
Help
Element Ecology & Life History Edition Date: 30Apr1991
Element Ecology & Life History Author(s): ISAAC, J.

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
  • Bissell, J.K. & C.W. BIER. 1987 DEC 30. PRESQUE ISLE STATE PARK: BOTANICAL SURVEY AND NATURAL COMMUNITY CLASSIFICATION. U87BIS02.

  • Bissell, J.K., and C.W. Bier. 1987 December 30. Presque Isle State Park: Botanical Survey and Natural Community Classification.

  • Borman, Susan, Robert Korth and Jo Temte. 1997. Through the Looking Glass. A Field Guide to Aquatic Plants. Wisconsin Lakes Partnership, University of Wisconsin - Stevens Point, Stevens Point, Wisconsin.

  • FNA (Flora of North America Editorial Committee). 2006c. Flora of North America North of Mexico. Vol. 21. Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford Univ. Press, New York. xxii + 616 pp.

  • Fairbrothers, D.E. et al. 1965. Aquatic Vegetation of New Jersey. Rutgers Univ. Ext. Serv. College of Agriculture. Ext. Bull. 382. Camden, New Jersey, USA.

  • Fairbrothers, D.E. et al. 1965. Aquatic Vegetation of New Jersey. Rutgers Univ. Ext. Serv. College of Agriculture. Ext. Bull. 382. Camden, New Jersey, USA. B65FAI01PAUS.

  • Fernald, M. L. 1950. Gray's manual of botany. 8th edition. Corrected printing (1970). D. Van Nostrand Company, New York. 1632 pp.

  • Fernald, M.L. 1949. Gray's Manual of Botany, Eighth edition. American Book Co. New York. B49FER01PAUS

  • Fernald, M.L. 1950 Gray's Manual of Botany, 8th ed. American Book Company, New York. 1632 pp.

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

  • Flora of North America Editorial Committee. 2006c. Flora of North America North of Mexico. Vol. 21. Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford Univ. Press, New York. xxii + 616 pp.

  • Gleason, H.A. 1952. New Britton & Brown. Illustrated Flora. Lancaster Press Inc. Lancaster, Pa. B52GLE01PAUS

  • Gleason, H.A. 1952. The new Britton and Brown illustrated flora of the northeastern United States and adjacent Canada. 3 volumes. Hafner Press, New York. 1732 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.

  • Greene, E.L. 1901. Studies in the Compositae - VIII. Pittonia 4:242-284.

  • Greene, E.L. 1901. Studies in the Compositae - VIII. Pittonia 4:242-284. A01GRE01PAUS

  • Harms, V.L., P.A. Ryan and J.A. Haraldson. 1992. The rare and endangered vascular plants of Saskatchewan. Prepared for the Saskatchewan Natural History Society. Unpubl.

  • Kartesz, J. T. 1991. Synonym names from 1991 checklist, as extracted by Larry Morse, TNC, June 1991.

  • 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. 1986. A checklist of New York State plants. Bulletin No. 458. New York State Museum. 272 pp.

  • New York Natural Heritage Program, New York State Department of Environmental Conservation. April 1999. Element Occurrence Record Database. Latham, 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.

Use Guidelines & Citation

Use Guidelines and Citation

The Small Print: Trademark, Copyright, Citation Guidelines, Restrictions on Use, and Information Disclaimer.

Note: All species and ecological community data presented in NatureServe Explorer at http://explorer.natureserve.org were updated to be current with NatureServe's central databases as of November 2016.
Note: This report was printed on

Trademark Notice: "NatureServe", NatureServe Explorer, The NatureServe logo, and all other names of NatureServe programs referenced herein are trademarks of NatureServe. Any other product or company names mentioned herein are the trademarks of their respective owners.

Copyright Notice: Copyright © 2017 NatureServe, 4600 N. Fairfax Dr., 7th Floor, Arlington Virginia 22203, U.S.A. All Rights Reserved. Each document delivered from this server or web site may contain other proprietary notices and copyright information relating to that document. The following citation should be used in any published materials which reference the web site.

Citation for data on website including State Distribution, Watershed, and Reptile Range maps:
NatureServe. 2017. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed:

Citation for Bird Range Maps of North America:
Ridgely, R.S., T.F. Allnutt, T. Brooks, D.K. McNicol, D.W. Mehlman, B.E. Young, and J.R. Zook. 2003. Digital Distribution Maps of the Birds of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Bird Range Maps of North America:
"Data provided by NatureServe in collaboration with Robert Ridgely, James Zook, The Nature Conservancy - Migratory Bird Program, Conservation International - CABS, World Wildlife Fund - US, and Environment Canada - WILDSPACE."

Citation for Mammal Range Maps of North America:
Patterson, B.D., G. Ceballos, W. Sechrest, M.F. Tognelli, T. Brooks, L. Luna, P. Ortega, I. Salazar, and B.E. Young. 2003. Digital Distribution Maps of the Mammals of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Mammal Range Maps of North America:
"Data provided by NatureServe in collaboration with Bruce Patterson, Wes Sechrest, Marcelo Tognelli, Gerardo Ceballos, The Nature Conservancy-Migratory Bird Program, Conservation International-CABS, World Wildlife Fund-US, and Environment Canada-WILDSPACE."

Citation for Amphibian Range Maps of the Western Hemisphere:
IUCN, Conservation International, and NatureServe. 2004. Global Amphibian Assessment. IUCN, Conservation International, and NatureServe, Washington, DC and Arlington, Virginia, USA.

Acknowledgement Statement for Amphibian Range Maps of the Western Hemisphere:
"Data developed as part of the Global Amphibian Assessment and provided by IUCN-World Conservation Union, Conservation International and NatureServe."

NOTE: Full metadata for the Bird Range Maps of North America is available at:
http://www.natureserve.org/library/birdDistributionmapsmetadatav1.pdf.

Full metadata for the Mammal Range Maps of North America is available at:
http://www.natureserve.org/library/mammalsDistributionmetadatav1.pdf.

Restrictions on Use: Permission to use, copy and distribute documents delivered from this server is hereby granted under the following conditions:
  1. The above copyright notice must appear in all copies;
  2. Any use of the documents available from this server must be for informational purposes only and in no instance for commercial purposes;
  3. Some data may be downloaded to files and altered in format for analytical purposes, however the data should still be referenced using the citation above;
  4. No graphics available from this server can be used, copied or distributed separate from the accompanying text. Any rights not expressly granted herein are reserved by NatureServe. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any trademark of NatureServe. No trademark owned by NatureServe may be used in advertising or promotion pertaining to the distribution of documents delivered from this server without specific advance permission from NatureServe. Except as expressly provided above, nothing contained herein shall be construed as conferring any license or right under any NatureServe copyright.
Information Warranty Disclaimer: All documents and related graphics provided by this server and any other documents which are referenced by or linked to this server are provided "as is" without warranty as to the currentness, completeness, or accuracy of any specific data. NatureServe hereby disclaims all warranties and conditions with regard to any documents provided by this server or any other documents which are referenced by or linked to this server, including but not limited to all implied warranties and conditions of merchantibility, fitness for a particular purpose, and non-infringement. NatureServe makes no representations about the suitability of the information delivered from this server or any other documents that are referenced to or linked to this server. In no event shall NatureServe be liable for any special, indirect, incidental, consequential damages, or for damages of any kind arising out of or in connection with the use or performance of information contained in any documents provided by this server or in any other documents which are referenced by or linked to this server, under any theory of liability used. NatureServe may update or make changes to the documents provided by this server at any time without notice; however, NatureServe makes no commitment to update the information contained herein. Since the data in the central databases are continually being updated, it is advisable to refresh data retrieved at least once a year after its receipt. The data provided is for planning, assessment, and informational purposes. Site specific projects or activities should be reviewed for potential environmental impacts with appropriate regulatory agencies. If ground-disturbing activities are proposed on a site, the appropriate state natural heritage program(s) or conservation data center can be contacted for a site-specific review of the project area (see Visit Local Programs).

Feedback Request: NatureServe encourages users to let us know of any errors or significant omissions that you find in the data through (see Contact Us). Your comments will be very valuable in improving the overall quality of our databases for the benefit of all users.