Flora of New Zealand Series

≡Verrucaria glabrata var. deprimens C.Knight, Trans. Linn. Soc. 23: 100 (1860).

Lectotype: New Zealand. Sine loco [probably Auckland], Charles Knight 307a – BM [fide Galloway (1985a: 491)].

Description : Flora (1985: 491).

N: Auckland, known only from the type collection.

Endemic

Illustration : Knight (1860: pl. XI, fig. 8 – as Verrucaria glabrata var. deprimens).

Pyrenula deprimens is characterised by: the corticolous habit; the greyish white to pale olive-grey, smooth, minutely maculate (×10 lens) thallus, developed in irregular patches, 1–5 cm diam., not delimited by a prothallus; solitary (rarely 2-together), applanate to hemispherical, black perithecia, with large ostioles with a distinct black rim; and citriform, 3-septate ascospores, 27–32(–36) × 12–15.5 μm.