Flora of New Zealand Series

≡Platygrapha macrospora C.Knight, Trans. N. Z. Inst. 12: 376 (1880).

=Lecidea interponens Nyl., Lich. Nov. Zel.: 94 (1888).

≡Patellaria interponens (Nyl.) Müll.Arg., Bull. Herb. Boissier 2, App. 1: 68 (1894).

≡Bacidia interponens (Nyl.) Hellb., Bihang K. Sv. Vet.-Akad. Handl. 21(3/13): 100 (1896).

≡Lecidea interposita Nyl. in A.M. Hue, Nouv. Archs Mus. Nat. Hist. Nat., Paris sér. 3, 4: 140 (1892).

Lectotype: New Zealand. Sine loco [probably Wellington], Charles Knight – WELT, Herb. Knight Vol. 46A, p. 22 [fide Galloway (1985a: 33)].

Lecidea interponens. Syntypes: New Zealand. Sine loco [probably Wellington] 1867, Charles Knight, 304 – H-NYL 17081; (2) 1867, Knight 32 – H-NYL 17082; (3) sub "Platygrapha macrospora Kn.", Knight – H-NYL 17083, 17084.

Description : Flora (1985: 32).

N: Northland (Te Paki), Wellington. On bark of trees (Knightia excelsa) and shrubs. Still poorly collected and understood.

Endemic

Illustration : Knight (1880: pl. XIII, fig. 43 – as Platygrapha macrospora).

Bacidia macrospora is characterised by: the corticolous habit; dirty yellowish to pale-olive, verrucose-uneven, glebose thallus, delimited by a thin, irregular, black prothallus; dark red-brown to blackened apothecia, surrounded by a pseudo-thalline margin of flattened or raised thalline granules; a thick, opaque, brown-black hypothecium; and acicular, 7–18-septate ascospores, 50–70(–90) × 3– 3.5 μm.