Specimens examined: Australia, Queensland, Mt Tamborine, 13.111.1984, J.L. Alcorn (PDD 48819, BRIP 14286); near Mary Cairncross Reserve, 21.111.1988, E.H.C. McKenzie (PDD 53907). Palau, Koror, 6.VI.1986, G.V.H. Jackson (PDD 45618). Vanuatu, Efate, Erakor Village, 21.IV.1983, E.H.C. McKenzie (PDD 46997); same details, 25.II.1985, E.H.C. McKenzie (PDD 46819, 46865 - holotype); Efate, Snake Hill, 21.X1.1983, E.H.C. McKenzie (PDD 46916); Malekula, Brenwei, 23.X1.1983, E.H.C. McKenzie (PDD 46996); Santo, near Hog Harbour, 15.11.1985, E.H.C.McKenzie (PDD46820); Tanna, White Grass, 19.11.1985, E.H.C. McKenzie (PDD 46878).

Colonies hypophyllous, occasionally on petioles and ascending leaf hairs. Mycelium superficial, pale, branched and anastomosing, smooth or verruculose, septate, 1.75-2.5 µm thick. Stroma absent. Conidiophores arising terminally and laterally on the hyphae, macronematous, single, composed of a macrnematous stipe and a complex head of branches bearing conidia. Stipes erect, straight or flexuous, smooth, occasionally verruculose towards apex, septate, brown, paler towards the apex, up to 460 µm long x (3-) 4.5-6 (-6.5) µm thick at base tapering to 2.5-4 µm thick at the apex. Primary branches sometimes bearing branchlets, pale brown, flexuous, up to 70 µm long, usually 15-40 µm long x 2-3 µm thick. Conidiogenous cells polyblastic, integrated, occasionally borne directly on hyphae, terminal, sympodial, conidial scars prominent, 0.75-1 µm wide. Conidia solitary, acropleurogenous, straw-coloured, smooth, non-septate, cylindrical to obovoid, apex obtuse, base truncate, 5-6 (-6.5) x 1.75-2 (-2.5) µm; hilum 0.75-1 µm thick.

On living leaves of Persea americana Mill.

Coloniae hypophyllae, interdum in petiolis, interdum pilos folii adscendentes. Mycelium ex hyphis superficialibus, pallidis, ramosis et anastomosantibus, laevibus vel verruculosis, septatis,1.75-2.5 µm crassis. Stroma nullum. Conidiophora apicalia et lateralia, macronematosa, mononematosa, solitaria. Stipites erecti, recti vel flexuosi, laeves vel saepe apicem versus verruculosa, septati, brunnei, apicem versus pallidiora, usque ad 460 µm longi x 2.5-6.5 µm crassi. Rami primarii interdum ramulosi, pallide brunnei, flexuoui, usque ad 70 µm longi, plerumque 15-40 µm longi x 2-3 µm crassi. Cellulae conidiogenae polyblasticae, in conidiophores incorporatae, terminales, sympodiales, cicatrices conidiales 0.75-1 µm latae. Conidia solitaria, acropleurogena, straminea, laevia, aseptata, cylindrica vel obovoidea, 5-6 (-6.5) x 1.75-2 (-2.5) µm; hilo 0.75-1 µm lato. In foliis lauraceae speciei Persea americana Mill. Holotypus PDD 46865.

Black mould growth is sometimes visible on the undersurface of the leaves. The leaves may show reddish-brown blotches, but fungal sporulation is not restricted to the discoloured areas. Conidiophores are concentrated along the mid-rib and veins.