Flora of New Zealand Series

A. ampliatum (Knight et Mitten) Müll. Arg., Bull. Herb. Boissier 2, App. 1: 85 (1894).

Arthonia ampliata Knight et Mitten, Trans. Linn. Soc. Lond. 23: 106 (1860).

A. infuscata Krempelh., Verhandl. zool.-bot. Ges. Wien 26: 450 (1876).

Lectotype: New Zealand. ?Auckland. Charles Knight 276, 1858, BM!

Arthonia infuscata. Holotype: New Zealand. Sine loco (prob. Wellington) Charles Knight, M!

Thallus glaucous-grey or greenish-grey, matt, smooth, ± areolate-cracked. Ascocarps innate, scattered or ± parallel, rounded or oblong 0.4-1.2 mm diam., partially veiled at margins by ruptured thallus, carbonaceous, matt, flat, blackish-brown. Ascospores brown 6-7-locular, upper cell the longer, 30-36 × 12 µm.

N: Auckland to Wellington, on smooth bark. Often with Thelotrema lepadinum.

Endemic