None Unlike its relative, the Oregon Silverspot , the future of Myrtle's Silverspot is far from certain. Formerly widespread on the San Francisco and Marin peninsulas, the butterfly is now only known from a few sites in northern Marin County most of which are under constant threat of development. Adults of Myrtle's Silverspot appear throughout the late summer and early fall.
Adults live for about three weeks during which time they feed on nectar, mate and lay eggs.
The eggs are laid only on species of Viola , possibly only Viola adunca . The eggs hatch in the fall. Most of the larval feeding, however, occurs in the spring when most of the violet's growth takes place. The adults emerge following a two week pupation. All of these have become increasingly popular as sites for residential development.