Common Hornwort

Ceratophyllum demersum

General Status Rank: 
Sensitive
ELCODE: 
PDCER01010
Common Name: 
Common Hornwort
Scientific Name: 
Ceratophyllum demersum
Naming References: 
B003
W018
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Taxonomy
Group: 
Vascular Plant
Kingdom: 
Plantae
Phylum: 
Magnoliophyta
Class: 
Dicotyledoneae
Order: 
Ceratophyllales
Family: 
Ceratophyllaceae
References: 
B003
Habitat
submersed in freshwater bodies
References: 
B003
Distribution

Ecozones

Taiga Plains, Taiga Shield
References: 
B003
H152

Distribution

0.15
Score: 
F
References: 
B003

Number of Occurrences

4(B003); DAO-2; CAN-0 Canadian Museum of Nature records=CAN; Agriculture Canada, Ottawa = DAO; some duplication of records likely exists (H152).
Score: 
A
References: 
B003
H152

Area of Occupancy

Score: 
-
Threats

Threats

Score: 
C

Intrinsic Vulnerability

Score: 
-
General Status Rank
Rank: 
Sensitive
Status Rank Description: 
Small regional distribution with very small number of occurrences and present in two ecozones. Although seemingly qualifying for consideration as "May Be at Risk", the species may be more common than present records indicate considering that the species is seemingly secure in MB, SK and BC and only vulnerable (S3) in AB. Aquatics, in general, have not been adequately surveyed across Canada (H152).
S Rank: 
S3
Decision Process Description: 
Drafted as not assessed by S. Carriere. Sensitive by E. Haber in 2004 (H152).; Reviewed in 2010, no change.; Reviewed in 2015 by Marilyn Anions; no change
Last Updated: 
July 3, 2015

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 (2004) Personal Communication- email to S. Carriere on 9/16/2004 with dicot 2.. email archive (printed version in GSR binders) - H152 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

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

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 (2004) Personal Communication- email to S. Carriere on 9/16/2004 with dicot 2.. email archive (printed version in GSR binders) - H152 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