Xanthoparmelia lavicola

Xanthoparmelia lavicola is a species of lichen in the family Parmeliaceae that can be found in Mexico north to Arizona and California in the United States. It has also been found in Ecuador. Xanthoparmelia lavicola grows in dry habitats on acidic rocks. It has been called the trochanter lichen.

Description
The upper part is either light yellow or yellow-green and the bottom surface is brown. The apothecia are 2 – wide and the thallus of which is laminal and is 4 – in diameter. The disc is either cinnamon-brown or dark brown and is ellipsoid. The pycnidia is immersed, while the conidia are bifusiform.