Cetrelia braunsiana
≡Parmelia braunsiana Müll.Arg., Flora 64: 506 (1881).
Description : Flora (1985: 84).
Chemistry : Cortex K+ yellow: Medulla K−, C−, KC+ pink, Pd−; containing alectoronic and α-collatolic acids and atranorin.
N: Northland to Wellington. S: Westland (Lake Kaniere). On bark, rarely on rock, mainly coastal on trees and shrubs. Still very infrequently collected in New Zealand. Known also from Japan, Taiwan, China, Nepal, India, Thailand, Philippines (Culberson & Culberson 1968; Wolseley et al. 2002; Randlane & Saag 2004).
Indo-Malesian
Illustrations : Culberson & Culberson (1968: pl. 13, fig. 55; pl. 15, fig. 58).
Cetrelia braunsiana is characterised by: the large, rounded lobes with ±ascendent, isidiate margins, the tips of the isidia being white-pruinose; scattered, laminal pseudocyphellae often also associated with tiny, granular-coralloid isidia; a black lower surface (brownish or greyish at the margins, ±concolorous with the upper surface); and alectoronic and α-collatolic acids (KC+ pink) in the medulla.