Enterographa crassa (DC.) Fée
Opegrapha crassa DC., in Lam. et DC., Fl. fr. ed. 3, 2: 312 (1805).
Thallus olive-green to grey or pale red-brown, smooth or minutely uneven, somewhat waxy, areolate, delimited by a thin, black, uneven, marginal prothallus, often forming coalescing mosaics, corticolous, rarely saxicolous. Lirellae minute, innate, to very slightly raised, round to elongate 0.2-0.8 mm long and to 0.3 mm broad, often confluent or irregularly arranged or in thread-like lines, disc brown-black, immarginate, impressed. Ascospores elongate, 3-7-septate, 25-30 × 4-5 µm.
N: S: Throughout, on bark of introduced deciduous trees in parks and gardens. Still very poorly collected.
Cosmopolitan
