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Loughmiller, Campbell and Lynn
Nuphar lutea ssp. polysepala
Nuphar lutea (L.) Sm. ssp. polysepala (Engelm.) E.O. Beal
Pond-lily, Rocky Mountain pond-lily
Synonym(s): Nuphar polysepala, Nymphaea polysepala, Nymphozanthus polysepalus
USDA Symbol: NULUP
Pond-lily is a large-leaved, aquatic perennial with bright yellow, waxy blossoms from 3-5 in. in diameter. The leathery, round to oval leaves may be 4-12 in. long. They are usually floating but are sometimes partially or wholly submersed.
Native Americans ground the seeds for flour and also roasted them as popcorn. This aquatic (and some others, including rice) gives off alcohol instead of carbon dioxide as it takes in oxygen. This species is also known as Wakas.
Plant CharacteristicsDuration: Perennial Habit: Herb Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: Jun , Jul , Aug
, WY Canada: BC Native Distribution: AK
to n. CA,
e. to Alt. & CO Native Habitat:
Ponds; shallow lakes; sluggish streams
Growing ConditionsLight Requirement: Sun
Soil Moisture: Wet
Soil Description: Shallow water.
BenefitUse Wildlife: Excellent cover for trout and other fish. Ducks eat the seeds.
Conspicuous Flowers: yes
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CANative Seed Network
- Corvallis, OR
Record Last Modified: 2007-01-01
Research By: TWC Staff