Pygmy White Waterlily (Small White Water-lily)

Nymphaea tetragona

General Status Rank: 
Sensitive
ELCODE: 
PDNYM050B0
Common Name: 
Pygmy White Waterlily (Small White Water-lily)
Scientific Name: 
Nymphaea tetragona
Naming References: 
W019-2004
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Taxonomy
Group: 
Vascular Plant
Kingdom: 
Plantae
Phylum: 
Magnoliophyta
Class: 
Dicotyledoneae
Order: 
Nymphaeales
Family: 
Nymphaeaceae
Habitat
Ponds, lakes, and quiet streams
References: 
W019-2004
Distribution

Ecozones

Taiga Plains, Taiga Shield, Boreal Plains
References: 
H126-05

Distribution

Probaly in 5% of NWT or more (specimen needs verifcation and then mapping) Widespread and fairly abundant in natural ponds between Yellowknife and Rae, found also in Deh Cho and mostly probaly more in South Slave.
Score: 
F
References: 
H126-05

Number of Occurrences

Total 5 confirmed + ?; 4(B036) as N tetragona spp leibergii (to be verified)? DAO: Central Experimental Farm herbarium from Bernard Boivin indicating the presence of a collection at the US National Herbarium, Smithsonian Institution, made on an island 40 mi NE of Fort Resolution by Preble #243 - N tetragona or N leibergii ?(H152). Three sites found in Deh Cho (H163) of which one confirmed Nymphaea tetragona Shallow wetland, Deh Cho area, 61.6225 ÌŠN, -121.1002 ÌŠW, G. Allen 91, 10 Aug. 2004 (DAO)(H171) ; 3 Confirmed tetragona: pond no. 2, W of Yellowknife at 62.4792 N, -114.7280 W, P. M. Catling & M. Fournier, 21 July 2003 (DAO); pond no. 124, W of Yellowknife at 62.5625 N, -115.0868 W, P. M. Catling & M. Fournier, 21 July 2003 (DAO); with Chara in pond in Spruce woods, 15 km N of Fort Simpson at 61.9124 N, -121.7005 W, P. M. Catling 102 & B. Kostiuk, 24 July 2004 (DAO). (H169); Scotty Creek at Goose Lake, 2012-13 (A427)
Score: 
A
References: 
B036
H152
H163
H168
H169
H171

Area of Occupancy

Score: 
-
Population

Population Size

rare (B003); Abundance high, seems to vary a lot in individual ponds from year to year, perhaps related to water levels or weather patterns Widespread and fairly abundant in natural ponds between Yellowknife and Rae. Certainly dozens, perhaps hundreds of occurrences using a single pond / small lake as an occurrence (H108_05)Surveys and local knowledge indicate that white waterlilies are widespread in southern NWT (SC). The species id in some site is uncertain between N tetragona or N leibergii (H126_2005)
References: 
B003
H108-05
Threats

Threats

Score: 
C
General Status Rank
Rank: 
Sensitive
Status Rank Description: 
Based on recent surveys and local knowledge the species is widespread in southern NWT. Local knowledge indicate that white waterlilies are widespread in southern NWT (SC). Some specimen id is uncertain between N tetragona or N leibergii (H126_2005), but tetragona species confirmed in 2003-04 by Catling and Fournier; Scotty Creek, 2012-13 (A427)
S Rank: 
S3
Decision Process Description: 
Drafted by S Carriere based on notes from 3 experts; Reviewed in 2010, no change; Reviewed in 2015 by Marilyn Anions; no change
Last Updated: 
January 29, 2016

References

Ecozones

  • Suzanne Carriere (2005) Pers. Comm.. - H126-05 Return

Habitat

  • Flora of North America Editorial Committee (2004) Flora of North America - North of Mexico. Oxford University Press Online Version http://hua.huh.harvard.edu/cgi-bin/Flora/ - W019-2004 Return

Naming

  • Flora of North America Editorial Committee (2004) Flora of North America - North of Mexico. Oxford University Press Online Version http://hua.huh.harvard.edu/cgi-bin/Flora/ - W019-2004 Return

NWT Known Subspecies

Flora of North America Editorial Committee (2004) Flora of North America - North of Mexico. Oxford University Press Online Version http://hua.huh.harvard.edu/cgi-bin/Flora/ - W019-2004 Return

Number of Occurrences

  • McJannet CL, Argus GW and Cody WJ (1995) Rare Vascular Plants in the Northwest Territories. Canadian Museum of Nature Syllogeus 73:1-104. RWED Library Call #QK86.C3M3 - B036 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
  • Jane Lancaster (2004) Notes on plants (e-mails in 2004). E-mail 16/11/2004 Copy in reference binder - H163 Return
  • Marilyn Anions (2005) A salix question review of subset 3. e-mail to S Carriere 5/04/2005 Print out in reference binder - H168 Return
  • Catling Paul (2004) White waterlilies - e-mail. From: CATLINGP /unix [mailto:CATLINGP@AGR.GC.CA] Sent: April 5, 2005 16:04 To: Suzanne Carriere /YK /ENR Subject: RE: White Waterlilies print out in reference binder - H169 Return
  • Catling Paul (2005) waterlilies. From: CATLINGP /unix [mailto:CATLINGP@AGR.GC.CA] Sent: April 8, 2005 08:49 To: Suzanne Carriere /YK /ENR Subject: waterlilies print out in ref binder - H171 Return

Population Size

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
,
Fournier M.A. (2004) Personal Communication. E-mail and notes on Infobase printout Copy in Refernce binder - H108-05 Return

Range Extent

  • Suzanne Carriere (2005) Pers. Comm.. - H126-05 Return