Smilax californica, the California greenbriar, is a common woody vine native to the western United States.
Description The leaves are dull green, petioled, alternate, and circular to heart-shaped. They are generally long. The stems are round, green and have sharp spines.Flora of North America Vol. 26 Page 472 Smilax californica (A. de Candolle) A. Gray
The plant is monoecious, with drooping flowers in leaf axils. The berry is black and roundish.
Distribution and habitat The plant is native to northern California and southwestern Oregon.Biota of North America Program, 2014 county distribution map It can be found near streambanks and mixed forests below in elevation.Encyclopedia of Life
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