Notes:
Locality: 35°12’47.92"N, 85°55’20.20"W, el. 586 m. Woodlands.

Substrate and habitat: Growing on a branch of scarlet oak, Quercus coccinea, brought to the ground by recent rain storms, in a park-like residential area bordering oak-dominated eastern deciduous woodland at the western rim of the Cumberland Plateau.

Chemistry:
Cortex: C-, K+ yellow to dark red to dark brown, KC- (bleaches much of the color), Pd+ yellow to orange in tiny spots and along cracks
Medulla: C-, K+ bright yellow to orange to red to dark red to dark brown, Pd+ bright orange immediately

References:
Sharnoff’s Parmotrema reticulatum gallery
CNALH images, description, and locality map, and a larger, interactive locality map.

Voucher specimen: United States, Tennessee, Franklin County, Sewanee, Woodlands. 07 Feb 2010. Chris Parrish 0051, det. James C. Lendemer (NY).

Common name: cracked ruffle lichen