ExplorePlants

Greater Duckweed

spirodela polyrhiza

Greater Duckweed is a tiny floating plant that loves to grow on the surface of ponds and lakes. It is a great food source for many water animals and helps keep the water clean!

Habitat: Freshwater ponds, lakes, and slow-moving streams

Appearance

The Greater Duckweed is a small, free-floating aquatic plant that forms bright green mats on the water's surface. Its individual fronds are round to oval, often with a distinctive reddish-purple underside and several fine rootlets hanging into the water, distinguishing it from smaller duckweeds.

KingdomPlantaePhylumTracheophytaClassLiliopsidaOrderAlismatalesFamilyAraceaeGenusSpirodela
Greater Duckweed
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Greater Duckweed

Category

Plants

Rarity

Common

Danger

0/5 · No known danger

Snaps

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Interesting facts

Duckweed can produce so much oxygen that it helps other creatures in the pond breathe!

It's the largest of the duckweed family, yet still often smaller than your pinky fingernail!

Many fish and birds love to munch on this tiny green plant like it's a super nutritious snack!

Scientists are studying duckweed to help clean up polluted water and even create new sustainable foods!

Special abilities

Ability

Rapid Colonizer

Greater Duckweed can reproduce incredibly fast, doubling its population in days to quickly cover water surfaces.

Ability

Water Purifier

Greater Duckweed can absorb excess nutrients from the water, which helps clean ponds and improve water quality.

Ability

Winter Survivor

Greater Duckweed has special buds called turions that sink, allowing it to survive freezing winters underwater.

Measurements & details

Height
0.3-1 cm
Spread
0.3-1 cm
Flower Size
0.05-0.1 cm
Edible
Yes
Toxicity
None
Lifecycle
Perennial
Pollination Method
Wind

Ecological connections

eaten by

Mallard

Anas platyrhynchos

ducks feast on its floating leaves

eaten by

Common Carp

Cyprinus carpio

carp filter-feed on duckweed fronds

eats

Great Pond Snail

Lymnaea stagnalis

snails graze on its green fronds

Traits

Also known as

DuckweedLemnaWater Fern

Collections

Safety

Danger

0/5 · No known danger

No special safety notes yet.

Frequently Asked Questions

How tall is Greater Duckweed?

0.3-1 cm

How wide does Greater Duckweed spread?

0.3-1 cm

How big are the flowers on Greater Duckweed?

0.05-0.1 cm

Is Greater Duckweed edible?

Yes

Is Greater Duckweed toxic?

None

What is Greater Duckweed's lifecycle?

Perennial

How is Greater Duckweed pollinated?

Wind

Where is Greater Duckweed usually found?

Freshwater ponds, lakes, and slow-moving streams

Snap Map

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Where to spot

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