Xanthoparmelia arida

Xanthoparmelia arida is a lichen which belongs to the Xanthoparmelia genus. It is an arid shield lichen, and is uncommon. It is listed as apparently secure by the Nature Conservatory. It is noted for being similar to Xanthoparmelia joranadia.

Description

This lichen grows to around 3–8 cm in diameter, with broad, dull, yellow-green, sub-irregular lobes that extend 1–3 mm wide. The underside is pale brown with simple rhizines approximately 0.3-0.6 mm long.

Habitat and range

It is found in the North American southwest, particularly in the state of Texas.

Chemistry

Xanthoparmelia arida has been recorded as containing both lecanoric and usnic acids.