Size: 1.25 - 1.5 inches wingspan
Key ID features: Above, pearly-white with black pattern on FW tip and thin black rectangle in forewing cell with no white scaling. Below, green marbling is darker, sometimes bluish and grainy.
Similar species: Large Marble is notably larger. California Marble lacks pearly or shiny look to white areas, and is found only in and near Josephine County.
Host plant: Tall tumblemustard, tansy mustard, rockcress and other crucifers.
Habitat: Primarily arid bottomlands, including desert flats, sage-steppe, bitterbrush plateaus, Pinyon-Juniper forest, and dry gullies.
Range: Most of eastern Oregon except Blue, Aldrich and Wallowa Mtns.
Season: Late March to late June
Conservation Status: Secure