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// SPECIES PROFILE · PERENNIAL · NATIVE

Purple rattlesnakeroot

Prenanthes racemosa

Purple rattlesnakeroot (Prenanthes racemosa) is a perennial in the — family. Native range includes MO — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 2a–7b. Mature size 17"–2'. Blooms Aug–Sep.

// QUICK FACTS
Family
—
Group
perennial
Native range
Native to 19 U.S. states, including CO, IA, IL, IN, KY, ME…
USDA hardiness
Zones 2a–7b
Mature size
17"–2'
Sun
—
Water
—
Bloom
Aug–Sep
Wildlife value
Pollinator and wildlife support
Ecological role
native species profile
Purple rattlesnakeroot (Prenanthes racemosa)
Prenanthes racemosa — Purple rattlesnakeroot. Photo by Joshua Mayer via Wikimedia Commons (CC BY-SA 2.0).

Field Notes

[ growing · ecology · siting · care ]

Purple rattlesnakeroot (Prenanthes racemosa) is a perennial in the — family. Native range includes MO — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 2a–7b. Mature size 17"–2'. Blooms Aug–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, purple rattlesnakeroot pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Gray Goldenrod (Solidago nemoralis), Lady Fern (Athyrium filix-femina), Maximilian Sunflower (Helianthus maximiliani).

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