// SPECIES PROFILE · PERENNIAL · NATIVE

Stiff sunflower

Helianthus pauciflorus ssp. subrhomboideus

Stiff sunflower (Helianthus pauciflorus ssp. subrhomboideus) is a perennial in the — family. Native range includes KS, MO. Hardy in zones 2a–10a. Blooms Jun–Sep.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 21 U.S. states, including CO, CT, IA, IL, IN, KS…
USDA hardiness: Zones 2a–10a
Mature size: —
Sun: Full sun
Water: —
Bloom: Jun–Sep
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Stiff sunflower (Helianthus pauciflorus ssp. subrhomboideus) — *Helianthus pauciflorus ssp. subrhomboideus* — Stiff sunflower. Photo via iNaturalist — (c) Rose Zappa, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Stiff sunflower (Helianthus pauciflorus ssp. subrhomboideus) is a perennial in the — family. Native range includes KS, MO. Hardy in zones 2a–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, stiff sunflower pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Gray Goldenrod (Solidago nemoralis), Lady Fern (Athyrium filix-femina), Swamp Milkweed (Asclepias incarnata).