Extract from Wikipedia article: Dimelaena oreina (golden moonglow lichen) is a greenish yellow placodioid lichen. The color of the greenish yellow thallus is derived from usnic acid in the cortex.
Golden moonglow lichen (Dimelaena oreina, greenish grey) and firedot lichen Fulgogasparrea appressa (Caloplaca appressa)(?) in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018 Unnamed Road, Llano, TX 78643, USA
Golden moonglow lichen (Dimelaena oreina, greenish grey) with some black granular lichen in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018 Unnamed Road, Llano, TX 78643, USA
Moonglow lichen (Dimelaena oreina)(?) in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018 Unnamed Road, Llano, TX 78643, USA
Moonglow lichen (Dimelaena oreina)(?) on pink granite of Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018 Unnamed Road, Llano, TX 78643, USA