Ranunculus californicus, the California buttercup, is a flowering plant of the buttercup family Ranunculaceae. It is a native of California, where it is common in many habitats, including chaparral and woodlands.
Its distribution extends across many habitats of California, north into Oregon and south into Baja California. Its reported locations include the islands between British Columbia and Washington, the Channel Islands of California, and the Sierra Nevada.
Ranunculus californicus grows up to 70 centimetres (2.3 ft) in height. The bright yellow flower is roughly 1–2 centimetres (0.033–0.066 ft) in diameter and has 7 to 22 shiny, teardrop-shaped petals. Each flower grows on a long, green, leafless stem.
- Munz, Philip A. (2003). Introduction to Shore Wildflowers of California, Oregon, and Washington. Berkeley: University of California Press.
- Jepson Manual Treatment — Ranunculus californicus
- USDA Plants Profile: Ranunculus californicus (California buttercup)
- CalFlora Database: Ranunculus californicus
- Ranunculus californicus — U.C. Photo gallery
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