Parmotrema crinitum (Ach.) M.Choisy
Parmelia crinita Ach., Syn. Lich.: 196 (1814).
Thallus orbicular to spreading, loosely attached, to 10 cm diam., corticolous. Lobes rounded, to 8 mm wide, margins sinuous, brown, moderately ciliate, cilia fine, black, to 4 mm long. Upper surface smooth, matt, pale greenish-grey to whitish, becoming reticulate-cracked centrally, moderately to densely isidiate. Isidia marginal and laminal, small, protuberant, to 1 mm tall, terete, brown-tipped, simple, becoming coralloid-branched and eventually sublobulate, often with small (1 mm), black cilia at base. Lower surface black with a smooth, shining, wrinkled, pale brown, naked marginal zone. Rhizines central, dense, black, simple. Apothecia not seen. Chemistry: Cortex K+ yellow; medulla K+ yellow, C-, KC-, Pd+ orange. Stictic acid and atranorin.
N: North Auckland (including Three Kings Is) to South Auckland (Kaimanawa Ra.). Most common on coastal vegetation (Avicennia, Leptospermum, Vitex) north of Auckland.
Cosmopolitan
It is distinguished from P. mellissii by differences in chemistry, more numerous rhizines and isidia which are never sorediate.
