Common Hornwort
Ceratophyllum demersum
In the Carolinas and Georgia, found in ponds, pools, slow-moving streams. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you
Native to Louisiana (estimated). How scores work Is it native here?
Profile 88%
- Light
- Partial shade, Full sun
- Soil moisture
- Standing water
At a glance
- Life cycle
- Perennial
- Bloom
- May to September
- Fruiting season
- Summer to fall
Not yet recorded · Height · Spread · Leaves
Height: NC species account not read yet.
Spread and leaves: no source found yet.
Recorded in 48 Louisiana parishes.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Still water and its edges: ponds, lakes, millponds and reservoirs.
Streams, rivers and their banks
Flowing water and its banks, bars and rocky shoals.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Louisiana. Shared habitat, not food. 93 animals.
- Henslow's SparrowAmmodramus henslowii
- Hooded MerganserLophodytes cucullatus
- Kentucky WarblerOporornis formosus
- King RailRallus elegans
- Lapland LongspurCalcarius lapponicus
- Lesser Black-backed GullLarus fuscus
- Louisiana WaterthrushSeiurus motacilla
- MerlinFalco columbarius
- Mottled DuckAnas fulvigula
- Neotropic CormorantPhalacrocorax brasilianus
- Northern ShovelerAnas clypeata
- Peregrine FalconFalco peregrinus
- Pileated WoodpeckerDryocopus pileatus
- Red-bellied WoodpeckerMelanerpes carolinus
- Ruddy TurnstoneArenaria interpres
- Tree SwallowTachycineta bicolor
- White-throated SparrowZonotrichia albicollis
- Wilson's PloverCharadrius wilsonia
- Wilson's SnipeGallinago delicata
- Wilson's WarblerWilsonia pusilla
- Wood ThrushHylocichla mustelina
Widespread birds also seen here (17)
Found in many habitats here, so not listed above.
Who uses this plant?
0CaterpillarsGenus host records with ranges including LA
0BeesSoutheastern regional records
0Specialist beesPollen specialists
7BirdsRecorded eating Ceratophyllum in Louisiana
Diet records by plant genus, from studies across North America. Not a record from this state. Birds whose range includes Louisiana, most records first.
- American CootSeeds and leaves. 5 diet records
- Ring-necked DuckSeeds. 4 diet records
- MallardFruit and seeds. 2 diet records
- Northern ShovelerSeeds and leaves. 2 diet records
- Red-winged Blackbird2 diet records
- GadwallLeaves. 1 diet record
- Lesser ScaupSeeds. 1 diet record
Direct food only. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening
No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects
Birds that eat Ceratophyllum 7
Diet records by plant genus, from studies across North America. Not a record from this state. Avian Diet Database (Hurlbert Lab), CC0 1.0.
- American CootFulica americana
- Ring-necked DuckAythya collaris
- MallardAnas platyrhynchos
- Northern ShovelerAnas clypeata
- Red-winged BlackbirdAgelaius phoeniceus
- GadwallAnas strepera
- Lesser ScaupAythya affinis
Plant details
- Family
- Ceratophyllaceae
- Flower color
- Blue
- Growth rate
- Rapid
- Growth habit
- Several stems
- Foliage color
- Gray-green
- Fruit begins
- Summer
- Fruit ends
- Fall
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “May to September” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Blue” · USDA PLANTS (ranked first; Lady Bird Johnson Wildflower Center differs) · Nationwide species characteristics; local growing conditions may vary
- Foliage color · “Gray-green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit begins · “Summer” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit ends · “Fall” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth habit · “Several stems” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth rate · “Rapid” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Life cycle · “Perennial” · Minnesota Wildflowers
- Light · “Partial shade; Full sun (documented habitat)” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- Soil · “Water (documented habitat)” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
Also known as
Coons Tail
Conservation status
| Louisiana rank | SNR |
|---|---|
| Global rank | G5 |
| LA status | Not verified |
| Federal status | Not verified |
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Sources
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025)
- Louisiana occurrence source
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications