Potamogeton vaseyi    J.W. Robbins

Vasey's Pondweed 


MN Status:
delisted
Federal Status:
none
CITES:
none
USFS:
none

Group:
vascular plant
Class:
Monocotyledoneae
Order:
Najadales
Family:
Potamogetonaceae
Life Form:
forb
Longevity:
perennial
Leaf Duration:
deciduous
Water Regime:
aquatic
Habitats:

(Mouse over a habitat for definition)


Best time to see:

 Foliage Flower Fruit 
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Potamogeton vaseyi Potamogeton vaseyi Potamogeton vaseyi

Click to enlarge

Potamogeton vaseyi
Minnesota range map
Map Interpretation
North American range map
Map Interpretation

  Basis for Former Listing

Potamogeton vaseyi is an aquatic macrophyte that inhabits small, soft water lakes in the northeastern portion of North America. It is reported to be an uncommon species across its range (Haynes and Hellquist 2000), but it seems to be especially uncommon in Minnesota, where it reaches the very western edge of its range. Several threats to the species' habitat have been identified including declining water quality, which seems to be a statewide trend, and the accelerating invasion of non-native species, which seems to be a worldwide trend. Potamogeton vaseyi was listed as a special concern species in Minnesota in 1984.

  Basis for Delisting

Recent botanical searches by the Minnesota Biological Survey discovered P. vaseyi in just over 120 lakes of more than 2,000 lakes that were surveyed. It is now known to be more common and widespread than once thought to be. Special concern status is no longer necessary, and Potamogeton vaseyi was delisted in 2013.

  References and Additional Information

Adams, J. W. 1929. Potamogeton vaseyi in southwestern Pennsylvania. Bartonia 10:28-29.

Fernald, M. L. 1932. The linear-leaved North American species of Potamogeton section Axillares in Memoirs of the Gray Herbarium of Harvard University 3:1-183.

Haynes, R. R., and C. B. Hellquist. 2000. Potamogeton. Pages 48-70 in Flora of North America Editorial Committee, editors. Flora of North America north of Mexico. Volume 22. Oxford University Press, New York, New York.

Hellquist, C. B. 1977. Observations on some uncommon vascular aquatic plants in New England. Rhodora 79:445-452.

Minnesota Department of Natural Resources. 2012. Statement of need and reasonableness. Minnesota Department of Natural Resources. Division of Ecological and Water Resources. St. Paul, Minnesota. 337 pp.

Pip, E. 1987. The ecology of Potamogeton species in central North America. Hydrobiologia 153:203-216.