A worldwide community photographing and learning about wildlife
Thin gray to chalk white thallus with flat, irregular shaped
surrounded by black prothallus. Often ...
, loosely adnate, lobed, upper surface gray,
Small patches of green slimy lichen with flat bluish-white
A crustose lichen with a whitish thallus and dark brown to
Thallus attached at central point, lacking isidia. Gray to dark brown with ...
Crustose lichen with a thin pale (non-cracked) thallus and round
damp, with very short, inconspicuous and often sparse,