Delphinium nudicaule, known by the common names canyon larkspur, red larkspur, orange larkspur, and canyon delphinium, is a flowering herbaceous perennial plant in the buttercup family Ranunculaceae. It is native to low-elevation canyons and slopes, foothills, and mountain ranges of California, US, from the Sierra Nevada to the California Coast Ranges, and of Oregon. It grows below 6,500 feet (2,000 m).

The plant sends up thin and long 1–2 feet (0.30–0.61 m) stems with finely dissected leaves. It bears attractive larkspur flowers in shades of red and orange that are generally pollinated by hummingbirds. D. nudicaule readily hybridizes with several other species of Delphinium.

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