Flavopunctelia flaventior (Stirt.) Hale

    Thallus foliose, rosette-shaped, 5-12 cm, composed of lobes, 3-8 mm wide, upper surface smooth to slightly wrinkled with white pseudocyphella 0.5-1 mm notably towards the margins and more or less numerous soralia, laminal or marginal (and in that case sometimes necklace-like as for Parmotrema perlatum/chinense), 0.5-2 mm diam., whitish to pale grey-greenish, overall thallus colour: pale yellow-greenish when dry, pale grey-greenish to pale yellowish when moist; lower surface dark brown, simple rhizines. Apothecia scarce, sessile, 3-8 mm diam., disc oncave, brown-rusty, exciple concolourous to the thallus. Ascospores simple, hyaline, broadly ellipsoid, 8-13 x 5-7 µm. Conidia filiform and bifusiform 6-10 µm long. Cortex: C-, K+ yellow, KC-, Pd-; Medulla and soralia: C+ pink to red, K-, KC+ red, Pd-. Rare, on bark of trees, deciduous and coniferous, sometimes on rocks. Distribution still partially unknown due to frequent confusion with other common species. N.B. In the field, this species draws attention since, as its name suggests, it is intermediate between Flavoparmelia caperata and may be even more Flavoparmelia soredians and some Puctellia species, notably Punctelia borreri. May exist in our region but a systematic prsopection would be required to clear the issue.*