Ogden's Pondweed (Potamogeton ogdenii)

Global Rank: G1 - Critically Imperiled
Legal Status: N/A
Family: Potamogetonaceae
State: CT, MA, NY, ON, VT
Nature Serve ID: 151664
Lifeform: Forb/herb
Date Inducted in National Collection:

Description:

Potamogeton ogdennii, or Ogden’s pondweed, is an aquatic annual plant. Its leaves are 2-3 inches long and very skinny (less than 1/10th of an inch wide). The flowers are held on stalks above the surface of the water, but fruits are uncommon. Vegetative budding during the winter is probably its most common method of reproduction. Potamogeton ogdennii is primarily threatened by aquatic invasive species and the herbicides that are used to control them. As well as by human actives that disturb its habitat. (COSWEC, 2007; Smith, 2016; NatureServe, 2018; New England Wildflower Society, 2018)

Where is Ogden's Pondweed (Potamogeton ogdenii) located in the wild?

Habitat:

Potamogeton ogdennii grows completely submerged in alkaline lakes, beaver ponds or slow-moving streams. (COSWEC, 2007; New England Wildflower Society, 2018)

Distribution:

Potamogeton ogdennii has an extremely restricted range in the upper Northeast USA and Ontario, Canada. As of 2016, it was only known from 9-11 locations, and it possibly extinct in Ontario. The global population trend is believed to be declining. P. ogdennii is classified as Vulnerable by the ICUN Red List criteria, as Critically Imperiled by NatureServe, and has regional Endangered status in Connecticut, Massachusetts and Ontario.

(COSWEC, 2007; Smith, 2016; NatureServe, 2018; USDA and NRCS. 2018)

States & Provinces:

Ogden's Pondweed can be found in Connecticut, Massachusetts, New York, Ontario, Vermont

Which CPC Partners conserve Ogden's Pondweed (Potamogeton ogdenii)?

Native Plant Trust

Not Sponsored

Assigned 06/09/17

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

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Ogden's Pondweed (Potamogeton ogdenii) Characteristics

Nomenclature

Taxon	Potamogeton ogdenii
Authority	Hellquist & Hilton
Family	Potamogetonaceae
CPC Number	6487
ITIS	504554
USDA	POOG
Duration	Perennial
Common Names	Ogden's Pondweed
Associated Scientific Names	Potamogeton ogdenii
Distribution	Potamogeton ogdennii has an extremely restricted range in the upper Northeast USA and Ontario, Canada. As of 2016, it was only known from 9-11 locations, and it possibly extinct in Ontario. The global population trend is believed to be declining. P. ogdennii is classified as Vulnerable by the ICUN Red List criteria, as Critically Imperiled by NatureServe, and has regional Endangered status in Connecticut, Massachusetts and Ontario. (COSWEC, 2007; Smith, 2016; NatureServe, 2018; USDA and NRCS. 2018)

State Rank

State	State Rank
Connecticut	S1
Massachusetts	S1
New York	S1
Ontario	SH
Vermont	S1

Ecological Relationships

Photos

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