// SPECIES PROFILE · PERENNIAL · NATIVE

American pillwort

Pilularia americana

American pillwort (Pilularia americana) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 4a–11a.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 13 U.S. states, including AL, AR, CA, GA, KS, MO…
USDA hardiness: Zones 4a–11a
Mature size: —
Sun: —
Water: High · moisture-loving
Bloom: —
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

American pillwort (Pilularia americana) — *Pilularia americana* — American pillwort. Photo via iNaturalist — (c) Paúl Gonzáles, some rights reserved (CC BY), uploaded by Paúl Gonzáles.

Field Notes

[ growing · ecology · siting · care ]

American pillwort (Pilularia americana) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 4a–11a.

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, american pillwort pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Common Evening Primrose (Oenothera biennis), Lady Fern (Athyrium filix-femina), Sneezeweed (Helenium autumnale).