Xanthoparmelia angustiphylla is a foliose lichen that belongs to the genus Xanthoparmelia.
Xanthoparmelia angustiphylla grows to around 5âÂÂ10 cm in diameter with regular to irregular rosettes that become more irregular over time. The upper surface is yellow-green and the lower surface is black with simple rhizines that are approximately 0.2âÂÂ0.8 mm long.
Xanthoparmelia angustiphylla is found mostly in North America, with limited observations in Australia and Europe.
Xanthoparmelia angustiphylla is known to contain menegazziaic acid and usnic acid.