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American Pillwort

Pilularia americana

In the Carolinas and Georgia, found in vernal pools and seepage areas on granitic flatrocks, other ponds, drawdown shores of lakes. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you

5
Modest

Native to Arkansas. How scores work Is it native here?

Profile 71%

Height
Up to about 4 inches
Light
Full sun
Soil moisture
Wet to standing water
Will it fit your yard?

Rare or protected plant. Specialist conservation planting; excluded from routine garden suggestions. Plant caution source

Hidden from default planting suggestions. Wildlife value and native status remain unchanged.

At a glance

Life cycle
Perennial
Bloom
April to October

Not yet recorded · Spread · Leaves

Recorded in 13 Arkansas counties.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

1 of 3

Granite and other acidic rock outcrops

Bare or thin-soil rock on granite, gneiss, sandstone, quartzite and similar acidic rock, including granite flatrocks and domes.

Seeps and springs

Places where groundwater keeps the soil or rock wet, such as seepage slopes and spring runs.

Ponds, lakes and their shores

Still water and its edges: ponds, lakes, millponds and reservoirs.

All habitats

Ecological relationships

Who uses this plant?

What these records mean

0CaterpillarsGenus host records with ranges including AR
0BeesSoutheastern regional records
0Specialist beesPollen specialists
—BirdsRecorded genus food-resource interactions; not a state feeding claim

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Marsileaceae
Flower color
Not applicable
Growing sources and scope

Conservation status

Arkansas rankS2
Global rankNot available
AR statusNot verified
Federal statusNot verified

Conservation source

In your garden

Will it fit your yard?

Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.

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How to check your spot

Sources