1999 California Academy of Sciences   cc-by-nc-sa-3.0

Pontia occidentalis (Western White) is a species of butterflies in the family Pieridae. They visit flowers of Lucerne, Streambank Groundsel, Shasta buckwheat, and Creeping Thistle.

EOL has data for 15 attributes, including:

Known occurrences, collected specimens and observations of Western White. View this species on GBIF