Type: Radicicolous Fungi; Description: Basidiomata pileate, centrally stipitate. Pileus 35–60 mm in diameter, pinkish brown, sprinkled more or less evenly (slightly more densely at centre) with dark, coarse scales, sometimes with a greenish tinge, convex at first, becoming plano-convex later, dry; flesh pink. Gills decurrent, moderately crowded, pale pink. Stipe with a bulbous base and a distinct pink annulus, pinkish brown with a greenish tinge, fibrillose, hollow, 40–90 mm long. Basidiospores broadly ellipsoid to ovoid, 7–9 × 5–7 bm, non-amyloid; spore print white.

Distribution: Taupo.; 1st Record: Hood (1992: as Armillaria sp.)

Significance: This unnamed species has been collected only from the Nothofagus forests of the central North Island and its pathogenicity is not known. It resembles A. hinnulea in morphology but studies using molecular techniques (Coetzee et al. 2001) have shown that it is distinct from A. hinnulea and is more closely related to the other Australasian Armillaria species.; Host(s): Nothofagus fusca, N. menziesii, N. solandri var. cliffortioides.