TYPE. UNITED STATES. Hawaii, Kauai, Lehua makanoe [Lihue Makahuena], on Wikstroemia, 15.VIII.1938, L.M. Cranwell, O. Selling & C. Skottsberg 6034 (UPS, holotype).

Description. Life form: lichenized fungus.

Thallus foliose, adnate, 2-7(-10) cm diam., often rosette-forming, 5-15 cm diam.; lobes radiating, inflated, hollow, 0.5-1.5 mm wide, usually contiguous, partly discrete or overlapping; upper surface gray or greenish gray, sometimes with brownish margins, smooth with round to oval perforations with flat rims. Vegetative diaspores soredia in soralia; soralia slightly elevated, at ends of erect lobes with an opening at the summit, sometimes with irregular to dactyloid projections. Photobiont chlorococcoid alga. Lower surface corticate, black, wrinkled; rhizines absent. Ascomata lecanorine apothecia, very rare.

Chemistry. Cortex K+ pale yellow (atronorin); medulla K+ yellow, KC-, C-, PD+ orange (stictic, constictic and menegazziaic acids).

Substrate and Habitat. Corticolous on trees.

Distribution. Cosmopolitan; in North Carolina found in the Blue Ridge ecoregion.

Literature

Bjerke, J.W. (2005) Synopsis of the lichen genus Menegazzia (Parmeliaceae, Ascomycota) in South America. Mycotaxon 91: 423-454.

Hinds, J.W. & P.L. Hinds (2007) The Macrolichens of New England. Memoirs of the New York Botanical Garden No. 96. New York Botanical Garden Press, Bronx, New York. 584 pp.