Hypotrachyna aspera is a species of foliose lichen in the family Parmeliaceae. The lichen forms loose, whitish rosettes with very narrow, finely divided lobes that give it a frilled appearance. It reproduces through small blisters on its surface that burst to release powdery granules containing both fungal and algal cells. Originally discovered in 2002 in the mountains of southeastern Brazil, it grows on acidic rocks in humid, partially shaded areas where moist forest meets open woodland. The species has since been found in several other Latin American countries, including Argentina, Bolivia, and Guatemala.

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