Species Details

Potamogeton praelongus

white-stemmed pondweed

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Classification

Scientific Name: Potamogeton praelongus Wulfen
Common Name: white-stemmed pondweed
Family:	Potamogetonaceae
Element Code:	PMPOT030V0
USDA Plants Symbol:	POPR5
Synonyms/Other Names:

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: changed from 2.3 to 2B.3 on 2013-06-12
Add Date:	1994-01-01
Date Edited:	2021-07-14

Ecology and Life History

Lifeform: perennial rhizomatous herb (aquatic)
Blooming Period: Jul-Aug
Elevation: 1800 - 3000 meters 5905 - 9845 feet
General Habitat: Marshes and swamps (lakes, deep water)
General Micro Habitat:
Micro Habitat:

Notes

Notes: Known in CA from approximately five occurrences. Hybridizes with P. richardsonii.
Threats:
Taxonomy:
Other:

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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Counties Quads

CNPS Rare Plant Inventory