// SPECIES PROFILE · PERENNIAL · NATIVE

Sampson's snakeroot

Orbexilum pedunculatum var. pedunculatum

Sampson's snakeroot (Orbexilum pedunculatum var. pedunculatum) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 3a–11b. Mature size 1"–32". Blooms Jun–Aug.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 20 U.S. states, including AL, AR, FL, GA, IL, IN…
USDA hardiness: Zones 3a–11b
Mature size: 1"–32"
Sun: Part shade
Water: —
Bloom: Jun–Aug
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Sampson's snakeroot (Orbexilum pedunculatum var. pedunculatum) — *Orbexilum pedunculatum var. pedunculatum* — Sampson's snakeroot. Photo via iNaturalist — (c) Michelle W. （鍾偉瑋）, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Sampson's snakeroot (Orbexilum pedunculatum var. pedunculatum) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 3a–11b. Mature size 1"–32". Blooms Jun–Aug.

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, sampson's snakeroot pairs naturally with: American Lotus (Nelumbo lutea), Broadleaf Arrowhead (Sagittaria latifolia), Blue-Eyed Grass (Sisyrinchium angustifolium), Butterfly Milkweed (Asclepias tuberosa).