// SPECIES PROFILE · PERENNIAL · NATIVE

Hornleaf riverweed

Podostemum ceratophyllum

Hornleaf riverweed (Podostemum ceratophyllum) is a perennial in the — family. Native range includes AR, OK. Hardy in zones 3a–10a. Blooms Jun–Sep.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 27 U.S. states, including AL, AR, CT, DC, DE, GA…
USDA hardiness: Zones 3a–10a
Mature size: —
Sun: Full sun
Water: —
Bloom: Jun–Sep
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Hornleaf riverweed (Podostemum ceratophyllum) — *Podostemum ceratophyllum* — Hornleaf riverweed. Photo by (c) simonpesant, some rights reserved (CC BY) via Wikimedia Commons (CC BY 4.0).

Field Notes

[ growing · ecology · siting · care ]

Hornleaf riverweed (Podostemum ceratophyllum) is a perennial in the — family. Native range includes AR, OK. Hardy in zones 3a–10a. Blooms Jun–Sep.

Why it's on this list: native species profile. Native-range data from the Lady Bird Johnson Wildflower Center (NPIN), cross-checked against iNaturalist observations. Part of Rooted Revival's regional native plant catalog — true natives for Oklahoma, Arkansas, Missouri and Kansas.

Companion Planting

[ guild · polyculture · cross-layer pairings ]

In the same native range, hornleaf riverweed pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Common Blue Violet (Viola sororia), Common Boneset (Eupatorium perfoliatum), Common Evening Primrose (Oenothera biennis).