J. californica may refer to:

  • Juglans californica, the California black walnut, California walnut or the Southern California black walnut, a large shrub or small tree species endemic to California
  • Juniperus californica, the California juniper, a tree species mainly found in California
  • Justicia californica, the chuparosa, hummingbird bush or beloperone, a flowering shrub species native to the deserts of southern California, Arizona and northern Mexico

See also

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