Small Pondweed

Potamogeton pusillus

General Status Rank: 
Undetermined
ELCODE: 
PMPOT030X0
Common Name: 
Small Pondweed
Scientific Name: 
Potamogeton pusillus
Synonyms: 
Potamogeton pusillus ssp pusillu
Naming References: 
B003
W018
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Taxonomy
Group: 
Vascular Plant
Kingdom: 
Plantae
Phylum: 
Magnoliophyta
Class: 
Monocotyledoneae
Order: 
Alismatales (Najadales)
Family: 
Potamogetonaceae
References: 
B003
General Biology

Longevity

perennial
References: 
B003
Habitat
quiet waters up to 2 m deep
References: 
B003
Distribution

Ecozones

Taiga Plains
References: 
B003
H150

Distribution

0.15
Score: 
G
References: 
B003

Number of Occurrences

9(B003); CAN-7; DAO-6 Canadian Museum of Nature records=CAN; Agriculture Canada, Ottawa = DAO; some duplication of records likely exists (H150).
Score: 
B
References: 
B003
H150

Area of Occupancy

Score: 
-
Threats

Threats

Score: 
C

Intrinsic Vulnerability

Score: 
-
General Status Rank
Rank: 
Undetermined
Status Rank Description: 
Small regional distribution with few occurrences within several ecozones; likely more common since it is a delicate pondweed of deeper waters (H150).Potamogeton berchtoldii is recognized at the species level (syn P. pusillus ssp tenuissimus) based upon Les, D.H., N.M. Murray & N.P. Tippery. 2009. Systematics of two imperiled pondweeds ( Potamogeton vaseyi, P. gemmiparus) and taxonomic ramifications for subsection Pusilli (Potamogetonaceae). Systematic Botany 34: 643-651. so P. pusillus locations need to be differentiated
S Rank: 
SU
Decision Process Description: 
Drafted undetermined by S. Carriere based on printed information only. Changed to secure by E. Haber in 2003 (H150).; Reviewed in 2010, no change.; Reviewed in 2015 by Marilyn Anions; no change; Reviewed in 2019 by Marilyn Anions, modified from secure to undetermined due to taxonomic changes
Last Updated: 
November 6, 2019

References

Ecozones

  • Porsild AE, and Cody WJ (1980) Vascular Plants of Continental Northwest Territories, Canada. National Museums of Canada RWED Library Call #QK203.N7P6http://ia601004.us.archive.org/22/items/vascularplantsof00pors/vascularplantsof00pors.pdf - B003 Return
  • Erich Haber (2003) Personal Communication - e-mail to S. Carriere on 19/11/2003 on Subset 1 Vascular plants (Monocots except orchids). Carriere Office - e-mail archive (printed verision in GSR binders) - H150 Return

Habitat

  • Porsild AE, and Cody WJ (1980) Vascular Plants of Continental Northwest Territories, Canada. National Museums of Canada RWED Library Call #QK203.N7P6http://ia601004.us.archive.org/22/items/vascularplantsof00pors/vascularplantsof00pors.pdf - B003 Return

Longevity

  • Porsild AE, and Cody WJ (1980) Vascular Plants of Continental Northwest Territories, Canada. National Museums of Canada RWED Library Call #QK203.N7P6http://ia601004.us.archive.org/22/items/vascularplantsof00pors/vascularplantsof00pors.pdf - B003 Return

Naming

  • Porsild AE, and Cody WJ (1980) Vascular Plants of Continental Northwest Territories, Canada. National Museums of Canada RWED Library Call #QK203.N7P6http://ia601004.us.archive.org/22/items/vascularplantsof00pors/vascularplantsof00pors.pdf - B003 Return
  • NatureServe: An online encyclopedia of life [web application]. (2001) Version 1.4 . Arlington, Virginia, USA: Association for Biodiversity Information.. Available: http://www.natureserve.org/. (Accessed: June 29, 2001 - W018 Return

NWT Known Subspecies

Kartesz, J. T. (1999) Synthesis of the North American Flora. North Carolina Botanical Garden North Carolina Botanical Garden, University of North Carolina Version 1.0 RWED Office, Yellowknife; Order from http://ucjeps.berkeley.edu/meacham/synthesis - DD2 Return
,
Erich Haber (2003) Personal Communication - e-mail to S. Carriere on 19/11/2003 on Subset 1 Vascular plants (Monocots except orchids). Carriere Office - e-mail archive (printed verision in GSR binders) - H150 Return

Number of Occurrences

  • Porsild AE, and Cody WJ (1980) Vascular Plants of Continental Northwest Territories, Canada. National Museums of Canada RWED Library Call #QK203.N7P6http://ia601004.us.archive.org/22/items/vascularplantsof00pors/vascularplantsof00pors.pdf - B003 Return
  • Erich Haber (2003) Personal Communication - e-mail to S. Carriere on 19/11/2003 on Subset 1 Vascular plants (Monocots except orchids). Carriere Office - e-mail archive (printed verision in GSR binders) - H150 Return

Range Extent

  • Porsild AE, and Cody WJ (1980) Vascular Plants of Continental Northwest Territories, Canada. National Museums of Canada RWED Library Call #QK203.N7P6http://ia601004.us.archive.org/22/items/vascularplantsof00pors/vascularplantsof00pors.pdf - B003 Return

Taxonomy

  • Porsild AE, and Cody WJ (1980) Vascular Plants of Continental Northwest Territories, Canada. National Museums of Canada RWED Library Call #QK203.N7P6http://ia601004.us.archive.org/22/items/vascularplantsof00pors/vascularplantsof00pors.pdf - B003 Return