The California buttercup (Ranunculus californicus) is a flowering plant of the buttercup family Ranunculaceae.
It is spring native of California and is common in many habitats. The plant grows 1 to 2 feet in height. The bright golden flower is about 3/4" in diameter and has eight to fifteen 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.