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California Buttercup

Ranunculus californicus

The California Buttercup brightens its surroundings with glossy, bright yellow flowers. Sprouting from the base are a few long, slender stems, topped by attractive golden flowers. The flowers are ¾ inches in diameter and have 9-17 petals. The dark green leaves which surround the base are divided into three deep lobes with toothed margins.



Basic Information

  • Member of the buttercup family Ranunculaceae

  • There are two recognized varieties of California Buttercup:

    • var. californicus — widespread

    • var. cuneatus — primarily on the north-central coast

    • These two varieties are distinguished by their stem length, with var. californicus having the longer stem

  • Perennial herb

  • Summer deciduous — plant dies back during the summer

Habitat

  • Native to western most of California, excluding the deserts, Baja California, Oregon, and some Pacific coast islands

  • Common to a variety of ecosystems, including grasslands, woodlands, coastal bluffs, chaparral, and moist meadows


Ecological Role

  • Supports a variety of small insects and native bees that are attracted to the flowers

  • The glossy-yellow petals of Ranunculus consist of 3 layers: a yellow pigment layer, an air layer, and a starch layer which together produce a reflective flash which may lure in pollinators


Reproduction

  • Blooms from February - April


Alternative Names

  • Common Buttercup


Historical Uses

  • Native people collected the seeds for pinole, a mixed flour made from the ground, toasted seeds of wildflowers and grasses

    • Pinole was eaten dry or moistened and shaped into balls or cakes


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