Hornleaf Riverweed
Podostemum ceratophyllum
Found in attached to rocks and dams in rapidly or slowly flowing water. Weakley, Flora of the Southeastern United States (2025), South Central edition What its natural habitat tells you
Native to Alabama. How scores work Is it native here?
Profile 65%
- Light
- Partial shade, Full sun
- Soil moisture
- Standing water

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 26 Alabama counties.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Alabama. Shared habitat, not food. 138 animals.
- Brewer's BlackbirdEuphagus cyanocephalus
- Cerulean WarblerDendroica cerulea
- Dark-eyed JuncoJunco hyemalis
- Evening GrosbeakCoccothraustes vespertinus
- Fish CrowCorvus ossifragus
- Fox SparrowPasserella iliaca
- GadwallAnas strepera
- KilldeerCharadrius vociferus
- Lark SparrowChondestes grammacus
- Least BitternIxobrychus exilis
- Lesser ScaupAythya affinis
- Little Blue HeronEgretta caerulea
- Northern Rough-winged SwallowStelgidopteryx serripennis
- Ring-billed GullLarus delawarensis
- Rose-breasted GrosbeakPheucticus ludovicianus
- Ruddy DuckOxyura jamaicensis
- SoraPorzana carolina
- Swamp SparrowMelospiza georgiana
Who uses this plant?
No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects
Plant details
- Family
- Podostemaceae
- Flower color
- Green
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “May to July” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- Flower color · “Green” · Lady Bird Johnson Wildflower Center
- Life cycle · “Perennial” · Lady Bird Johnson Wildflower Center
- Light · “Partial shade; Full sun (documented habitat)” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- primary_flower_color · “green” · Lady Bird Johnson Wildflower Center
- Soil · “Water (documented habitat)” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
Also known as
Hornleaf; Riffle Weed; River Weed
Conservation status
| Alabama rank | SNR |
|---|---|
| Global rank | G5 |
| AL 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
- Alabama Plant Atlas
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition
- 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



















