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// SPECIES PROFILE · ANNUAL · NATIVE

Clark mountain spurge

Euphorbia exstipulata

Clark mountain spurge (Euphorbia exstipulata) is a annual in the — family. Native range includes OK — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 2a–11a. Mature size 6"–1'. Blooms Jun–Nov.

// QUICK FACTS
Family
—
Group
annual
Native range
Native to AZ, CA, NM, OK, TX, UT, WY
USDA hardiness
Zones 2a–11a
Mature size
6"–1'
Sun
—
Water
—
Bloom
Jun–Nov
Wildlife value
Pollinator and wildlife support
Ecological role
native species profile
Clark mountain spurge (Euphorbia exstipulata)
Euphorbia exstipulata — Clark mountain spurge. Photo via iNaturalist — no rights reserved.

Field Notes

[ growing · ecology · siting · care ]

Clark mountain spurge (Euphorbia exstipulata) is a annual in the — family. Native range includes OK — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 2a–11a. Mature size 6"–1'. Blooms Jun–Nov.

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, clark mountain spurge pairs naturally with: Common Sunflower (Helianthus annuus), Rocky mountain bee-plant (Peritoma serrulata), Swamp verbena (Verbena hastata), Powell's amaranth (Amaranthus powellii).

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