Flora of New Zealand Series

Holotype: New Zealand. South I., Westland, Paparoa National Park, Punakaiki Creek, "in ripa rivi prope ostium in mare, ad folia palmarum", 24.ix.1997, W. Malcolm & A. Vězda – CHR. Isotypes – BM, CANB, DUKE, ESS, GZU, H, HO, M, PRM, TSB, UPS, VBI, Herb. K. Kalb, Herb. A. Vězda.

Description : Thallus thin, epiphyllous, greenish grey to somewhat pellucid, well-delimited. Photobiont green, cells globose to rectangular, radiating, forming a continuous, plane surface. Perithecia 0.25–0.4 mm diam., subglobose, in basal parts brown-black, naked, black, glossy above. Wall purple-black, K−, simple, closed, beneath ostiole 30–35 μm thick, thinner below exciple. Periphyses not seen. Paraphyses 1 μm thick, soon disappearing. Ascus wall disappearing at maturity. Ascospores fusiform, 7-septate, halonate, 28–30 × 3.5–4 μm. Pycnidia frequent, immersed in thallus. Conidia ellipsoidal, 2 × 1 μm.

S: Westland. Known only from the type collection.

Endemic

Illustrations : Vězda (1999b: 3, fig. 1).

Porina diffluens is characterised by: the foliicolous habit; the brown-black, glossy perithecia; fusiform, 7-septate, halonate ascospores, 28–30 × 3.5–4 μm.