[Notes from Kew Type specimen, PRJ 2010] In the Kew Hymenoscyphus metrosideri packet Horak 67/121 "Helotium near metrosideri" on Elaeocarpus hookerianus leaves; duplicated from PDD 19379. Images of the Horak Specimen. Apothecia with look of Lanzia 'aureus', assoc with extensive blackened patches on the fallen leaves.

STROMA substratal, causing conspicuous blackening of the leaf surface. APOTHECIA scattered or gregarious, hypophyllous, situated on or near the midrib or main veins, erumpent, stipitate. DISC 0-9-1.2 mm diam., plano-concave, bright yellow when fresh, drying deep ochraceous to brick-red, smooth. RECEPTACLE cupulate to repand, darker reddish-brown when dry, with a conspicuous yellowish-brown, tomentose-fibrillose surface. STIPE central, stout, cylindric, shorter than disc diam., concolorous. ASCI 85-103 x 11-13 µm, 8-spored, cylindric or cylindric-clavate, tapered below to a short, stout, rounded base, apex broadly rounded or truncate, the pore not blueing in Melzer's reagent. ASCOSPORES 12.5-14.0 x 5.5-7.0, mean 13.2 (SD 0.5) x mean 6.1 (SD 0.3) µm, hyaline, broadly ellipso-fusoid to ovate fusoid, tapered distally, ends rounded or pointed, symmetrical or slightly inequilateral, usually biguttulate, non-septate, obliquely uniseriate. PARAPHYSES filiform, obtuse, remotely septate, 1.5-2.0 µm diam., enlarged towards the apex to about 4 µm diam., equalling or slightly exceeding the asci, somewhat agglutinated above by hyaline amorphous matter. SUBHYMENIUM c. 30 µm thick at centre, narrowed to 15 µm towards the margin at the base of the hymenium, composed of loosely interwoven hyaline hyphae and small irregular cells 2-5 µm diam. MEDULLARY EXCIPULUM about 60 µm thick at the base of the receptacle, narrowed towards the margin, composed of somewhat interwoven, largely parallel hyphae, 4-5 µm diam., with hyaline or faintly pigmented walls. In the stipe, similar vertically arranged, thin-walled hyphae occur. ECTAL EXCIPULUM composed of prismatic cells mostly 10-15 x 5-7 µm in the receptacle, more elongated, 20-25(-30) µm in the receptacle, more elongated, 20-25(-30) µm in the stipe, with thickened, somewhat refractive walls, arranged in rows at a low angle to the surface, forming a layer 35-50 µm thick, narrowed to the margin. Ectal cells hyaline or very pale brown, giving rise at the surface to clavate, hair-like elements up to 60 µm long, 6-10 µm diam., at the apex, with brown or yellow-brown walls. Pigmentation uniform, particularly on cells towards the margin of the receptacle, or deposited as irregular granules. Ectal cells at the margin more elongated, brown and thin walled, marginal tissue 30-35 µm thick

On rotten leaves of Elaeocarpus hookerianus. New Zealand, known only from the type locality.

Stroma substratale, conspicuum. Apothecia hypophylla, in costa vel in venis principalibus, erumpentia, stipitata. Discus 0.9-1.2 mm diam., plano-concavus, laete luteus, siccitate intense ochraceus vel lateritius, laevis. Receptaculum cupulare, magis fuscum, siccitate rubro-brunneum, superficie conspicue fulvo-brunnea tomentoso-fibrillosa. Stipes robustus, cylindricus, quam disci diametros brevior, concolor. Asci 85-103 x 11-13 µm, octospori, cylindrico-clavati, basi brevi, rotundata, apice rotundato vel truncato, poro in iodino baud caerulescente. Ascosporae 12.5-14.0 x 5.5-7.0 µm, hyalinae, late ellipso-fusoideae vel ovato-fusoideae, distaliter fastigatae, extremis rotundatis aut acutis, biguttulatae, non-septatae, oblique uniseriatae. Paraphyses filiformes, obtusi, 1.5-2.0 µm diam., apice 4 µm, parte superiors conglutinati. Excipulum ectale 35-50 µm crassum, e cellulis prismaticis sistens, muris hyalinis pallide brunneis incrassatis, cellulis marginalibus fuscioribus muris tenuibus, in receptaculo 10-15 x 5-7 µm, in stipite magis elongatis 20-30 µm, superficiei fere parallels dispositis, ad superficiem corpora clavata luteobrunnea capilliformia usque 60 µm longa, apice 6-10 µm diam. Pigmentatio aequabilis, praecipue in cellulis marginem receptaculi versus sitis, vel sicut granula irregularia deposita.

NEW ZEALAND: Prov. Canterbury, Mt. Grey, on rotten leaves of Elaeocarpus hookerianus, 20 ix 1967, leg. Horak 67/121 (Holotype, K).