the epithet pirongia, derived from the type locality, Mount Pirongia, is a noun in apposition, and therefore remains spelt the same when transferred from Poria to Haploporus, despite the latter genus being masculine in gender.

Basidiocarps annual, resupinate, difficult to separate from the substrate, soft corky when fresh, corky upon drying, odor- or tasteless when fresh, up to 8 cm long, 2 cm wide and 1.7 mm thick at center. Pore surface white to cream when fresh, pale brownish when bruised, pinkish buff to clay-buff upon drying; sterile margin very narrow to almost lacking; pores round to angular, 3–4 per mm; dissepiments thick, entire. Subiculum cream, corky, thin, about 0.3 mm thick. Tubes light buff, corky, about 1.4 mm long.

Hyphal system trimitic: generative hyphae bearing clamp connections, hyaline, thin-walled, frequently branched; skeletal hyphae dominant, thick-walled to subsolid, hyaline to slightly yellowish, frequently branched; binding hyphae abundant, slightly thick-walled, IKI–, CB+, tissues unchanging in KOH.

Generative hyphae frequent, hyaline, thin-walled, frequently branched, 2.3–3.5 µm in diam; skeletal hyphae dominant, hyaline, distinctly thick-walled with a narrow lumen to subsolid, occasionally branched, interwoven, 2.5–4 µm in diam; binding hyphae abundant, slightly thick-walled,1–2 µm in diam.

Generative hyphae frequent, hyaline, thin-walled, frequently branched, 1.7–3.5 µm in diam; skeletal hyphae distinctly thick-walled with a narrow to wide lumen, frequently branched, interwoven, 2.5–4 µm in diam; binding hyphae slightly thick-walled,1–2.5 µm in diam. Cystidia absent; cystidioles present, fusiform, occasionally with an apical simple septum, sometimes with a few small guttules, 21–28 × 5–7 µm. Basidioles dominant, similar in shape to basidia, but slightly smaller, occasionally with a few large guttules; basidia pear-shaped to barrel-shaped with 4-sterigmata and a basal clamp connection, 21–35 × 8–11 µm. Hyphae at dissepiment usually thick-walled with simple septum. Dendrohyphidia absent. Some irregular-shaped crystals present among tube tramal structures.

Basidiospores oblong-ellipsoid to cylindrical, hyaline, thick-walled, with tuberculate ornamentations, some with a guttule, IKI–, CB+, 11–14(–15) × (4.8–)5.2–7 µm, L = 12.35 µm, W = 6.11 µm, Q = 1.83–2.15 (n = 90/3).

AUSTRALIA. Victoria, Melbourne, Dandenong Ranges Botanical Garden, on dead branch of Rhododendron, 12 May 2018, Dai 18659, 18660 & 18661 (MEL, dupl. in BJFC); on dead branch of Eucalyptus, 12 May 2018, Dai 18662 (MEL, dupl. in BJFC). NEW ZEALAND. Omahu Bush, on Melicytus, 15 Feb 2010, Cooper (PDD 95714, dupl. in BJFC).