Apothecia gregaria, erumpentia, stipitata; disco flavo, 1 mm. lato, excipulo alba, pilis erectis, obtusis, paullulum septatis, scabriusculis, hyalinis, 75-80 x 3.5-5 µ obtecto; asci clavati, octospori, 75-80 x 9-10 µ, apice rotundati, jodo non tincti; ascosporae distichae, fusoideae, utrinqe, acutatae, biguttulatae, hyalinae, 11-14 x 3-4 µ; paraphyses cylindraccae, apice acutatae, 2-2.5 µ cr.

The rather round-topped asci lacking a pore-plug stained blue by iodine suggest a Perrotia but the paraphyses, though slender, seem to be pointed at the tip and the spores are not like those of other Perrotias. The material is unfortunately scanty and in poor condition and the generic position may be reconsidered when better collections are available. Spores of a rather similar trapezoidal shape, 8-12 µ long, were described for Lachnum trapeziforme Vel., on Carpinus leaves in Czechoslovakia.

In cortice Nothofagi fuscae, 600 m, Lake Waikaremoana, Auckland district, 29.12.1955, Dingley 18987 (typus).

[Notes from Kew Type specimen, PRJ 2010] Kew images.

NEW ZEALAND: Auckland, Lake Waikaremoana, 2000', on bark of Nothofagus fusca, 29 xii 1955, leg. J.M. Dingley, ex P.D.D. 18987 (Holotype, K).

APOTHECIA erumpent, short-stipitate, solitary or clustered, often compound with two or more discs arising from a common stipe. DISC 1.0-1.3 mm diam., plano-concave, pale orange or cream, outline often undulating or lobed, margin incurved when dry. RECEPTACLE shallow cupulate or discoid, clothed with white hairs and with a pulverulent appearance, at least when dry. STIPE cylindric, up to 0.5 mm high, orange-brown, darker than the receptacle and lacking hairs except towards the apex. HAIRS hyaline, cylindric, obtuse, straight or flexuous, septate, thin-walled, granulate, 3-4 µm diam., often slightly expanded towards the apex, longest, 90-120 µm long, at the margin, mostly 30-60 µm long on the receptacle and stipe. ASCI 75-85(-90) x 9-12 µm, 8-spored, cylindric-clavate, the apex somewhat narrowed but rounded, thin-walled, the pore not blue in Melzer's reagent even after pre-treatment in 5% KOH. ASCOSPORES 12-18 x 3.5-5.0, mean 4.6(SD 1.3) x mean 4.3(SD 0.4) µm, hyaline, fusoid or often narrowly rhomboidal, the ends acute and frequently drawn out into an apiculus-like point, non-septate, 1-or 2-guttulate, irregularly biseriate. PARAPHYSES hyaline, simple, remotely septate, often tapered but not acutely pointed at the apex, equal to or slightly exceeding the asci, (1.5-)2.0-2.5 µm diam. SUBHYMENIUM not clearly differentiated. MEDULLARY EXCIPULUM a hyaline textura intricata composed of closely interwoven thin-walled, septate hyphae 1.5-2.5 µm diam., becoming more parallel in the upper receptacle, and not differentiated at the margin. ECTAL EXCIPULUM up to 40 µm thick at the base of the receptacle, narrower on the stipe and towards the margin, composed in the stipe of irregularly arranged, narrow hyphae immersed in a gel, the innermost hyphae in a zone up to 20 µm thick with pale brown walls. On the receptacle, composed of subparallel agglutinated septate hyphae 4.0-5.5 µm diam., lying at a rather high angle to the surface below, curving round parallel to the surface at the margin and there forming a textura prismatica with cells mostly 10-15 x 3-4 µm.

Known only from the type locality.

On bark of Nothofagus fusca (Hook. f.) Oersted.

This species is still, unfortunately, known only from the type collection which, as noted by Dennis (1961), is somewhat scanty and not well-preserved. Further material would be desirable for study to clarify its generic position, but the excipular structure is evidently not that of a Lachnum nor are the asci characteristic of that genus. The asci have a broad, thin-walled, undifferentiated apex which, as also noted by Dennis, is typical of Perrotia., and the excipular structure is also consistent with this genus. Although the ascospore shape is quite unlike that of the type species, it is acceptable for Perrotia in the broader concept of the genus adopted here.