Xanthoparmelia vicentii

Xanthoparmelia vicentei is a species of saxicolous (rock-dwelling) foliose lichen in the family Parmeliaceae. Originally thought to be endemic to western Spain, it was discovered in Luxembourg in 2023, suggesting it may be more widespread in Europe than previously thought. The lichen forms yellowish-green thalli up to 7 cm wide with distinctive finger-like projections in the centre and rolled-back lobes with black tips. Chemical tests show it contains specific lichen products that help identify it from similar species....read more on Wikipedia.