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), Northern Tier edition What its natural habitat tells you
Native to West Virginia. How scores work Is it native here?
Profile 65%
- Light
- Partial shade, Full sun
- Soil moisture
- Standing water

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 7 West Virginia counties.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in West Virginia. Shared habitat, not food. 99 animals.
- Golden EagleAquila chrysaetos
- Golden-winged WarblerVermivora chrysoptera
- Hermit ThrushCatharus guttatus
- Hooded WarblerWilsonia citrina
- KilldeerCharadrius vociferus
- Lark SparrowChondestes grammacus
- Least BitternIxobrychus exilis
- Lesser ScaupAythya affinis
- Little Blue HeronEgretta caerulea
- Northern Rough-winged SwallowStelgidopteryx serripennis
- Olive-sided FlycatcherContopus cooperi
- OvenbirdSeiurus aurocapilla
- Pileated WoodpeckerDryocopus pileatus
- Red-bellied WoodpeckerMelanerpes carolinus
- Red-shouldered HawkButeo lineatus
- Ring-billed GullLarus delawarensis
- Rose-breasted GrosbeakPheucticus ludovicianus
- Ruby-throated HummingbirdArchilochus colubris
- Ruddy DuckOxyura jamaicensis
- Scarlet TanagerPiranga olivacea
- Snowy EgretEgretta thula
- Snowy OwlBubo scandiacus
- SoraPorzana carolina
- Swainson's WarblerLimnothlypis swainsonii
Widespread birds also seen here (37)
Found in many habitats here, so not listed above.
- Alder Flycatcher
- American Crow
- American Goldfinch
- American Kestrel
- American Robin
- Belted Kingfisher
- Blue Grosbeak
- Blue Jay
- Blue-gray Gnatcatcher
- Cedar Waxwing
- Chimney Swift
- Chipping Sparrow
- Common Nighthawk
- Common Raven
- Cooper's Hawk
- Dark-eyed Junco
- Eastern Kingbird
- Eastern Towhee
- European Starling
- Great Crested Flycatcher
- Great Horned Owl
- Least Flycatcher
- Mourning Dove
- Northern Cardinal
- Northern Flicker
- Northern Mockingbird
- Osprey
- Purple Finch
- Red-tailed Hawk
- Ruby-crowned Kinglet
- Sharp-shinned Hawk
- Spotted Sandpiper
- Tufted Titmouse
- Turkey Vulture
- Wild Turkey
- Yellow-breasted Chat
- Yellow-rumped Warbler
Who uses this plant?
No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects
Plant details
- Family
- Podostemaceae
- Flower color
- Green
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
| West Virginia rank | S2 |
|---|---|
| Global rank | G5 |
| WV 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
- NatureServe Explorer
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition
- West Virginia 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

























