Species Details

Potamogeton epihydrus

Nuttall's ribbon-leaved pondweed

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Photo of Potamogeton epihydrus
Louis-M. Landry, 2010
Photo of Potamogeton epihydrus
Louis-M Landry, 2010
Photo of Potamogeton epihydrus
Al Keuter, 2013
CA Rare Plant Rank: 2B.2
Fed List: None
State List: None
Global Rank: G5
State Rank:
Other Status: IUCN_LC
CRPR Changes:
changed from 2.2 to 2B.2 on 2013-06-12
Add Date: 1994-01-01
Date Edited: 2021-08-25
Lifeform: perennial rhizomatous herb (aquatic)
Blooming Period: (Jun)Jul-Sep
369 - 2172 meters
1210 - 7125 feet
General Habitat:
  • Marshes and swamps (shallow freshwater)
General Micro Habitat:
Micro Habitat:
Threatened by recreational activities and water contamination. Possibly threatened by vehicles. Hybridizes with P. nodosus.
Total Occurrences: 25
Element Occurrence Ranks:
1 1 2 0 0 21
Occurrence Status:
Historical >20 Years 17
Recent <=20 Years 8
Presumed Extant 25
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Alabama (AL), Alaska (AK), Arkansas (AR), California (CA), Colorado (CO), Connecticut (CT), Delaware (DE), District of Columbia (DC), Florida (FL), Georgia (GA), Idaho (ID), Illinois (IL), Indiana (IN), Iowa (IA), Kentucky (KY), Louisiana (LA), Maine (ME), Maryland (MD), Massachusetts (MA), Michigan (MI), Minnesota (MN), Mississippi (MS), Missouri (MO), Montana (MT), Nevada (NV), New Hampshire (NH), New Jersey (NJ), New York (NY), North Carolina (NC), Ohio (OH), Oregon (OR), Pennsylvania (PA), Rhode Island (RI), South Carolina (SC), South Dakota (SD), Tennessee (TN), Utah (UT), Vermont (VT), Virginia (VA), Washington (WA), West Virginia (WV), Wisconsin (WI), Wyoming (WY)
California Counties and Islands: Name (Code)
El Dorado (ELD), Madera (MAD), Mariposa (MPA), Mendocino (MEN), Modoc (MOD), Nevada (NEV), Placer (PLA), Plumas (PLU), Shasta (SHA), Tuolumne (TUO)
Quads: Name (Quad Code)
Ackerson Mtn. (3711977), Alturas (4112045), Beaver Mtn. (4112086), Beckwourth Pass (3912071), Boles Meadows East (4112067), Cahto Peak (3912365), Cisco Grove (3912035), Cooper Peak (3811927), Covelo East (3912372), Covelo West (3912373), Crescent Mills (4012018), El Capitan (3711966), Eureka Hill (3812385), Falls Ridge (3711984), Ferris Creek (4012013), Igo (4012255), Jacks Butte (4112057), Laytonville (3912364), Little Shuteye Peak (3711944), McGinty Reservoir (4112075), Mt. Bidwell (4112082), Pease Flat (4112085), Pinecrest (3811928), Point Arena (3812386), Pyramid Peak (3812072), South Mtn. (4112076), Surprise (4112054), Tahoe City (3912022), Ten Lakes (3711985), Whiskeytown (4012265), Whittemore Ridge (4112066), Willits (3912343), Yosemite Falls (3711975)
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.


Presumed Extant
Counties   Quads