Lobariella sipmanii Moncada, Betancourt & Lücking  

Thallus growing on trunks and stems of small trees, up to 8 cm diam., very loosely attached; individual lobes up to 3 cm long, irregular to rounded, 5–15 mm wide, irregularly branched. Photobiont cyanobacterial (Nostoc). Upper surface pale blue-grey, glabrous, densely white-reticulate through the formation of elongate-linear maculae; lower surface white to yellowish white, white-tomentose; tomentum up to 1.5 mm thick, formed by branched hairs with globose cells. Lobe margins entire to coarsely crenulate; isidia and soralia absent. Upper cortex paraplectenchymatous, consisting of 4–6 cell layers, 30–45 µm thick, hyaline; cyanobacterial layer 80–130 µm thick; medulla composed of longitudinally oriented hyphae, up to 180 µm thick; lower cortex paraplectenchymatous, consisting of 2–6 cell layers from which the tomentum emerges, 12–25 µm thick, hyaline. Apothecia abundant, cup-shaped, up to 8 mm diam., with thick, strongly prominent, more or less entire to irregular but not distinctly lobulate, white margins; disc concave, vividly orange-brown. Ascospores fusiform to acicular, 55–115 x 4–5 µm, 5–9-septate, hyaline. Pycnidia not observed. Secondary chemistry: gyrophoric acid (major) and satellite substances; medulla C+ rose to red, K–, P–.

Mycobank #: MB 519082