CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record potamogeton_zosteriformis - Wed, Dec. 1, 2021, 11:29 ET b
Potamogeton zosteriformis
common nameeel-grass pondweed
CalPhotos image
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life formannual herb aquatic
CA Rare Plant Rank
List 2B.2
LIST 2B: Rare, threatened, or endangered in California, but more common elsewhere.
     0.2: Fairly endangered in California
state rank
S3      ranking system key
global rank
G5     G5: demonstrably secure to ineradicable
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (17):
Merced Falls (440D) 3712053, Jersey Island (480C) 3812116, Bouldin Island (480D) 3812115, Fales Hot Springs (488C) 3811934, Clearlake Highlands (533B) 3812286, Wendel (620C) 4012032, Cassel (662A) 4012185, Jess Valley (674A) 4112023, Burney Falls (679C) 4112116, Dana (679D) 4112115, Alturas (692A) 4112045, Rattlesnake Butte (692B) 4112046, Infernal Caverns (692D) 4112035, Canby (693A) 4112047, Washington Mountain (693B) 4112048, Egg Lake (695D) 4112133, Boles Meadows East (710A) 4112067
quad data info

Counties, states, regions:
Contra Costa (CCA), Lake (LAK), Lassen (LAS), Merced (MER), Mono (MNO), Modoc (MOD), Shasta (SHA), Alaska (AK), Conneticut (CT), Iowa (IA), Idaho (ID), Illinois (IL), Indiana (IN), Kansas (KS), Massachusetts (MA), Maryland (MD), Maine (ME), Michigan (MI), Minnesota (MN), Montana (MT), North Dakota (ND), Nebraska (NE), New Hampshire (NH), New Jersey (NJ), New York (NY), Ohio (OH), Oregon (OR), Pennsylvania (PA), South Dakota (SD), Utah (UT), Virginia (VA), Vermont (VT), Washington (WA), Wisconsin (WI), West Virginia (WV), Wyoming (WY)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Marshes and swamps (MshSw)(assorted freshwater)
blooming period Jun-Jul  
elevation range0 - 1860 meters
To be expected in the Central Valley; need information.
full namePotamogeton zosteriformis Fern.
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  POZO Element Code  PMPOT03160
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Wed, Dec. 1, 2021 from

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