Ramalina leptocarpha, also known as the western strap lichen, is a species of cartilage lichen found in Oregon, California, and Baja California.

[2] R. leptocarpha often grows in epiphytic association with Ramalina menziesii.

[4] Trebouxia decolorans is its primary algal photobiont.

[4] This species was first described in 1858 by Edward Tuckerman from a collection made in Monterey, California.

[5] This article about lichens or lichenology is a stub.