Sulcaria isidiifera

Species of lichen

Sulcaria isidiifera, commonly known as the splitting yarn lichen, is a rare species of pendent (hanging) fruticose lichen in the family Parmeliaceae. It has a dull yellowish-white to light brown and reddish-brown thallus and is typically 3–5 cm (1.2–2.0 in) long. It is only known to occur in the Los Osos Oaks State Natural Reserve, in the Central Coast of California region, where it grows on a variety of shrubs.

This keyword could refer to multiple things. Here are some suggestions: