Taxon Details

Potamogeton praelongus

white-stemmed pondweed

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Taxon Summary:

Potamogeton praelongus, commonly known as white-stemmed pondweed, is a perennial rhizomatous herb (aquatic) in the Potamogetonaceae that is found in California and elsewhere. It occurs within Marshes and swamps (lakes, and deep water), growing at elevations from 1800 to 3000 meters. Potamogeton praelongus is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification

Scientific Name: Potamogeton praelongus Wulfen
Common Name: white-stemmed pondweed
Family:	Potamogetonaceae
Element Code:	PMPOT030V0
USDA Plants Symbol:	POPR5
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.3
Fed List:	None
State List:	None
Global Rank:	G5
State Rank:	S2
Other Status:	IUCN_LC
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2023-12-05

Ecology and Life History

Lifeform: perennial rhizomatous herb (aquatic)

Blooming Period: Jul-Aug

Elevation:
1800 - 3000 meters
5905 - 9845 feet

General Habitats:

Marshes and swamps (lakes, deep water)

Microhabitat Details:

Microhabitat:

Notes

Notes: Hybridizes with P. richardsonii.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					12
A	B	C	D	X	U
0	1	0	0	0	11

Occurrence Status:
Historical >20 Years	7
Recent <=20 Years	5

Presence:
Presumed Extant	12
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Alaska (AK), California (CA), Colorado (CO), Connecticut (CT), Idaho (ID), Illinois (IL), Indiana (IN), Iowa (IA), Maine (ME), Maryland (MD), Massachusetts (MA), Michigan (MI), Minnesota (MN), Montana (MT), Nebraska (NE), New Hampshire (NH), New Jersey (NJ), New York (NY), North Dakota (ND), Ohio (OH), Oregon (OR), Pennsylvania (PA), South Dakota (SD), Utah (UT), Vermont (VT), Washington (WA), Wisconsin (WI), Wyoming (WY)

California Counties and Islands: Name (Code)
El Dorado (ELD), Lassen (LAS), Madera (MAD), Mono (MNO), Nevada (NEV), Plumas (PLU), Shasta (SHA), Sierra (SIE), Trinity (TRI)

Quads: Name (Quad Code)
Almanor (4012122), Antelope Lake (4012025), Canyondam (4012121), Caples Lake (3812061), Chester (4012132), Crystal Crag (3711951), Dunderberg Peak (3811913), English Mtn. (3912045), June Lake (3711971), Lundy (3811912), Mammoth Mtn. (3711961), Manzanita Lake (4012155), Mt. Harkness (4012143), Mumbo Basin (4112225), Webber Peak (3912044), Westwood West (4012131)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory