Females lay eggs on or near the host plant.
One flight from June-August. Windswept, barren, alpine and arctic ridges. Western mountains from Alaska and Yukon south through British Columbia and Alberta to northern Washington and northern Montana. Populations in the contiguous United States are very limited and all should be conserved. G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.