Sparsum, erumpens, tenue. Peritheciis elongato-ellipticis, parallelis; labiis erosis, rigentibus, tenuibus, atris; disco cinereo. Ascis clavatis. Sporidiis ellipticis, uniseptatis, brunneis (0.02-0.025 x 0.008 mm.).

A singular species, with no immediate allies

On Phormium tenax. Winton (390).

[Notes from Kew Type specimen, PRJ 2010] Current name Brunaudia phormiigena, spelling of this in K is Bruneaudia.

Type: New Zealand: Winton, on Phormium tenax, [coll. S. Berggren] [Herb. Cooke No. 390] (K - 4 syntypes).

Ascomata apothecioid, scattered, arranged in parallel on the substrate, subcuticular, at first immersed in the host tissues and enclosed by a clypeate cover mainly consisting of host cuticle tissue, later cover is thrown off to expose a slightly concave cinereous disc not or slightly raised above the host surface, oblong-elliptic in outline, erumpent, sessile on a broad more or less plane base, black, 1-2(-4.5) mm long, 0.3-0.7 mm wide, and less than 0.2 mm tall, broadly discoid in median vertical section, the margin raising the substrate surface to 40-80 µm, smooth, without crystalline inclusions and remnants of the host cuticle, brown; not forming zone lines on the substrate. Exciple well-developed at the sides, forming a margin, 40-50 um wide, ± two-layered, the inner layer consisting of vertically oriented 2-3 µm wide elongated and compressed cells, the outer layer of radiating slightly shorter and wider cells, with marginal hyphae that are thin-walled, brown, but not carbonized; at the base the exciple is continuous with the hypothecium. Hypothecium composed of small angular or slightly elongated cells, 30-40 µm tall below the hymenium, colourless above but light brown below and including the uppermost 1-2 layers of plant cells; the host cells sometimes strongly degraded and replaced by brown, septate and branched 2-3 µm wide hyphae. Hamathecium of paraphyses, filiform, branched, 2 µm wide, slightly enlarged above, embedded in a gelatinous matrix which becomes brownish in Lugol's solution and Melzer's reagent or yellowish with pretreatment with KOH, slightly exceeding the asci. Asci cylindric-clavate, thin-walled, apex rounded, not thickened, short-stalked, 8-spored, 100-120 x 13 µm. Ascospores biseriate, occupying nearly the whole ascus, ellipsoid or obovate, with rounded ends, 1-3-septate, constricted at least at the primary septum, smooth, brown, not surrounded by a mucilaginous sheath, 20-25(-28) x 6-10 µm.

New Zealand, known only from the type collection.

On stems of Phormium tenax (Phormiaceae, Monocotyledones).