// SPECIES PROFILE · GRASS · NATIVE

Threeway sedge

Dulichium arundinaceum

Threeway sedge (Dulichium arundinaceum) is a grass in the — family. Native range includes AR, MO, OK. Hardy in zones 1a–11b. Mature size 6"–3'.

// QUICK FACTS

Family: —
Group: grass
Native range: Native to 42 U.S. states, including AK, AL, AR, CA, CT, DC…
USDA hardiness: Zones 1a–11b
Mature size: 6"–3'
Sun: Part shade
Water: High · moisture-loving
Bloom: —
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Threeway sedge (Dulichium arundinaceum) — *Dulichium arundinaceum* — Threeway sedge. Photo by Robert H. Mohlenbrock. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln. Courtesy of USDA NRCS Wetland Science Institute. via Wikimedia Commons (Public domain).

Field Notes

[ growing · ecology · siting · care ]

Threeway sedge (Dulichium arundinaceum) is a grass in the — family. Native range includes AR, MO, OK. Hardy in zones 1a–11b. Mature size 6"–3'.

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, threeway sedge pairs naturally with: Broadleaf cattail (Typha latifolia), Three-way sedge (Dulichium arundinaceum var. arundinaceum), Needle spikerush (Eleocharis acicularis), Needle spikerush (Eleocharis acicularis var. porcata).