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Hornleaf Riverweed

Podostemum ceratophyllum

In the Carolinas and Georgia, found in attached to rocks and dams in rapidly or slowly flowing water. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you

8
Modest

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

Profile 65%

Light
Partial shade, Full sun
Soil moisture
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
May to July

Not yet recorded · Height · Spread · Leaves

This plant is missing most of its facts, so Quercus is looking them up in old botany books.

Recorded in 3 Louisiana parishes.

Ecological relationships

Who uses this plant?

What these records mean

0CaterpillarsGenus host records with ranges including LA
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
Podostemaceae
Flower color
Green
Growing sources and scope
Also known as

Hornleaf; Riffle Weed; River Weed

Conservation status

Louisiana rankS1
Global rankG5
LA statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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How to check your spot

Sources