Austrobaileya 6, 4: 949 - 955 (2004).
"Australia: New South Wales. Pigeon House Mountain, 35°21'S 150°16'E, c. 650 m altitude, on vertical rock face in a west-facing, rather moist cleft, 21 October 1999, G. Kantvilas 344/99 (holo: HO; iso: GZU, NSW).
Type: Australia, New South Wales, Pigeon House Mountain, on vertical rock face in a west-facing, rather moist cleft, 35°21'S 150°16'E, ca. 650 m, 21.10.1999, G. Kantvilas 344/99 (HO - holotype, GZU, NSW - isotypes).
Thallus: foliose, loosely attached to soil or soft sandstone. Lobes markedly flattened, decumbent, generally discrete, spreading and broadly rounded at the thallus margins, much divided, contiguous to imbricate and at times + erect and subfruticose in the thallus centre, undulate to concave, sometimes + cochleate, 1 - 3 - 6 mm wide, with dorsal and ventral surfaces + identical; surface chalky white, sometimes developing a faint beige tinge in the herbarium, generally smooth in younger parts of the thallus but becoming verrucose in older parts, very intensely and coarsely scabrid-mealy throughout; margins + entire or minutely and irregularly crenulate, undulate or ascending, not thickened, very brittle and frequently fractured. Thallus in section 120 - 230 µm thick; well-defined cortex absent, but outermost layers of the thallus with a 10 - 50 µm thick layer of tiny crystals not dissolving in KOH, visible at high-power magnification in polarised light; photobiont cells spherical, 7 - 13 µm diameter, irregularly clumped, especially beneath the dorsal surface of the thallus; medullary hyphae rather loosely and irregularly interwoven, 5-8 µm thick, with walls to 3 µm thick. Rhizines mostly uncommon and typically widely scattered, pale brownish, 0.25 - 0.5 mm thick at point of attachment (Kantvilas 2004: 949).
Algae: Green algae.
Chemistry: Thamnolic acid, decarboxythamnolic acid; K+ intense yellow, sometimes slowly becoming brownigh red, KC-, C-, P+ orange, UV- (Kantvilas 2004: 950).
Molecular data: Genbank
Distribution: Database
Note:
Ecology: In moist, sheltered clefts and on ledges, usually on large cliffs and bluffs. Vertical rock faces are especially favoured.