Juglans californica, the California black walnut, California walnut or the Southern California black walnut, a large shrub or small tree species endemic to California
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Juniperus californica, the California juniper, a tree species mainly found in California
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Justicia californica, the chuparosa, hummingbird bush or beloperone, a flowering shrub species species native to the deserts of southern California, Arizona and northern Mexico
Vitis californica | Verbena californica | Vauquelinia californica | '''Torreya californica''', with young shoots,
PAN Botanical Garden, Warsaw | Rosa californica | Rhynchospora californica | Rhamnus californica | Rafinesquia californica | Phryganidia californica | Orobanche californica | Orcuttia californica | Oenothera californica | Notholaena californica | Neokochia californica | Lasthenia californica | Kallstroemia californica | Justicia californica | Juniperus californica | Juglans californica | Gutierrezia californica | Festuca californica | Eschscholzia californica | Ephedra californica | Encelia californica | Cerithidea californica |
Encelia californica, the California brittlebush, a flowering plant species native to southern California and Baja California
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Eschscholzia californica, the California poppy, a plant species native to the western United States and in Mexico
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Ephedra californica, the California jointfir, California ephedra, desert tea or cañatillo, a plant species native to southern California, Arizona and Baja California
Festuca californica, the California fescue, a grass species native to California and Oregon
Gutierrezia californica, the San Joaquin snakeweed and California matchweed, a flowering plant species native to California and Baja California
Kallstroemia californica,the California caltrop, a flowering plant species native to the deserts of the southwestern United States and Mexico
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Neokochia californica, the rusty molly, a flowering plant species native to the valleys and deserts of southeastern California
Lasthenia californica, the California goldfield, a flowering plant species native to California and Oregon
Notholaena californica, the California cloak fern, a plant species native to southern California, Arizona, and adjacent northwestern Mexico
Orobanche californica, the California broomrape, a plant species native to western North America
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Oenothera californica, the California evening primrose, a flowering plant species native to parts of the southwestern United States and Baja California
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Orcuttia californica, the California Orcutt grass, a rare grass species native to southern California and northern Baja California
Rosa californica, the California wild rose, a plant species native to California and Oregon
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Rhynchospora californica, the California beaked-rush or California beaksedge, a plant species endemic to California
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Rhamnus californica, the California buckthorn or coffeeberry, a plant species native to California and southwestern Oregon
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Rafinesquia californica, the California chicory or California plumeseed, a flowering plant species native to most of the southwestern United States as far north as Oregon and to Baja California in Mexico
Verbena californica, the California vervain or Red Hills vervain, a plant species endemic to California
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Vitis californica, the California wild grape, a wild grape species native to most of California and southwestern Oregon
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Vauquelinia californica, the Arizona rosewood, a plant species found in the southwestern portion of the USA, in Baja California and Baja California Sur