opegrapha

Definitions

Any lichen species of the genus Opegrapha.

Equivalents

Examples

“But every part is usually covered with thin, membranaceous lichens, (Lecanoras, Lecideas, letter-like Opegraphas) in clouds of every shade of white, gray, and brown, outside, which are often large patches of gray, yellow, and sulphur-colored foliaceous lichens, (Parmelias).”

“[...] and finally a fourth description of Lichens (Opegraphas) establish⟳ themselves upon the bark of living trees, occasionally burying themselves beneath the skin, through which their shields alone peep forth in the strange form⟳ of the letters of some eastern tongue.”

CEFR level