Phyllopsora buettneri var. glauca
≡Phyllospora parvifolia (Pers.) Müll.Arg. var. glauca de Lesd., Rev. Bryol. Lichénol. 7: 60 (1934).
Description : Thallus squamiform, effuse or circular with radiating marginal squamules. Prothallus usually well-developed, reddish brown. Squamules large, adnate or ascending, elongated, incised to deeply divided, plane to weakly convex. Upper surface pale-green to medium-green, glabrous or pruinose in inner parts, usually distinctly pruinose towards lobe apices; margins pale, pubescent. Laciniae numerous, developing from tips of ascending lobes, mainly in central parts of thallus. Isidia absent. Apothecia rare, to 1.5 mm diam., rounded, solitary to conglomerate, convex and immarginate even when young, dark reddish brown. Exciple medium-brown internally, dark reddish brown in outer parts. Hypothecium pale- to medium-brown. Hymenium reddish brown throughout. Ascospores short-fusiform, simple to 1-septate, 6–13 × 2–3 μm.
Chemistry : Argopsin, norargopsin, vicanicin, norvicanicin and ±zeorin (Brako 1991: 30).
N: Northland (Waima State Forest, Waitemara Gorge Track), Wellington (Kitchener Park Feilding). On Melicytus ramiflorus bark in lowland forest. Known also from Mexico, the Caribbean, Central and South America, East Africa, Madagascar, Mauritius, India and Papua New Guinea (Kalb 1990; Brako 1991).
Pantropical
Illustration : Brako (1991: 31, fig. 17C, D).
Phyllopsora buettneri var. glauca is characterised by: the corticolous habit; the pubescent or pruinose, incised, lobulate or infrequently isidiate squamules, and the distinctive chemistry.
