Enterographa hutchinsiae (Leight.) A. Massal. ss. str. ss. auct. brit.
Stigmatidium hutchinsiae (Leight.) Nyl.
Chiodecton hutchinsiae (Leight.) Zahlbr.
Thallus crustose strongly applied to its substrate, more or less thick and slightly rough, a little or strongly cracked, dark brown-gray but more generally olive-brown, greenish-brown, blackish hypothallus if present. Apothecia numerous, lirelliform, bacilliform, sometimes forked or branched giving the appearance of Chinese characters, totally buried in the thallus (but see Enterographa hutchinsiae forma, some of which are raised and have the appearance of lirella), 0.5-1 x 0.1-0.4 mm, flat, broad disc, blackish to brownish, typically bordered by a slight yellowish swelling especially visible in humid weather. Spores colorless, 4-6-septate, 22-28 x 4-5 µm. No characteristic color reactions. Rare species occurring on the vertical faces of siliceous rocks in the shade of trees, always humid and even sometimes dripping, in coastal ravines or in oceanic forests, more rarely at the base of the trunks of old trees which border these ravines and in this case often in the company of Enterographa crassa, some forms of which are difficult to distinguish. For the specimens at the base of the trunks of old trees see: Enterographa hutchinsiae s.l. NB See also a fairly similar species: Opegrapha lithyrga which occurs in the same places but whose apothecia are finer lirella, protruding and in relief and not buried in the thallus.