// SPECIES PROFILE · ANNUAL · NATIVE

Stiffstem flax

Linum rigidum

Stiffstem flax (Linum rigidum) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Mature size 1"–20". Blooms May–Jul.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 16 U.S. states, including AR, CO, IA, IL, KS, MN…
USDA hardiness: Zones 2a–10a
Mature size: 1"–20"
Sun: Full sun
Water: Low · xeric
Bloom: May–Jul
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Stiffstem flax (Linum rigidum) — *Linum rigidum* — Stiffstem flax. Photo via iNaturalist — no rights reserved.

Field Notes

[ growing · ecology · siting · care ]

Stiffstem flax (Linum rigidum) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Mature size 1"–20". Blooms May–Jul. Low water use makes it a strong candidate for xeric and drought-conscious plantings.

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, stiffstem flax pairs naturally with: Common Sunflower (Helianthus annuus), Plains Coreopsis (Coreopsis tinctoria), Prairie groundsel (Packera plattensis), Swamp verbena (Verbena hastata).