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Lachnum berggrenii Spooner 1987

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Lachnum berggrenii Spooner 1987
Lachnum berggrenii Spooner 1987

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Endemic
Present
New Zealand
Political Region

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Spooner
Spooner
1987
548
ICN
Lachnum berggrenii Spooner 1987
NZ holotype
species
Lachnum berggrenii
NEW ZEALAND: Waitaki, on undetermined bark, undated, leg. Berggren 286 (Holotype, K).

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berggrenii

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Lachnum berggrenii Spooner 1987

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

Lachnum berggrenii Spooner 1987

APOTHECIA 0.8-1.5 mm diam., scattered, superficial, short-stipitate. DISC concave, pale orange-brown, smooth. RECEPTACLE cupulate, concolorous, clothed with whitish hairs, sometimes pale brownish in dried apothecia. STIPE central, usually slightly tapered, shorter than disc diameter, concolorous, often smooth near the base. HAIRS mostly 60-90 x 2.5-3.5 µm, hyaline, cylindric, usually flexuous, obtuse, thin-walled, septate, finely granulate throughout and bearing abundant particles and irregular masses of yellow-brown or amber coloured resinous matter. ASCI (80-)90-100 x 7-8 µm, 8-spored, narrowed at the base, apex conical, the pore strongly blue in Melzer's reagent. ASCOSPORES 13-20 x 2.2-2.8, mean 15 (SD 1.3) x 2.6 (SD 0.1) µm, hyaline, fusoid, straight, often slightly inequilateral, containing a row of guttules, non-septate, irregularly biseriate. PARAPHYSES cylindric or rarely narrowly lanceolate, tapered and usually pointed at the apex, sparsely septate, sometimes branched, hyaline, 2 .0-2.5 µm diam., scarcely exceeding the asci. SUBHYMENIUM not clearly differentiated. MEDULLARY EXCIPULUM composed in the stipe of vertically oriented, undulating and slightly interwoven hyphae 2-3 µm diam., continuing into the receptacle and forming at the centre and in a narrow layer in the flanks, a compact textura intricate of slightly narrower hyphae 1.5-2.0 µm diam. A compact layer of similar, parallel hyphae lies adjacent to the ectal excipulum. ECTAL EXCIPULUM a compact, hyaline layer 25-30 µm thick, composed of narrow, prismatic cells mostly 12-20 x 3-4 µm, with thin or slightly thickened walls, lying in rows at a low angle to the surface.
On dead bark. Known only from the holotype collection.
Apothecia 0.8-1.5 mm diam., dispersa, superficialis, brevistipitata. Discus concavus, laevis, pallide aurantiaco-brunneus. Receptaculum cupulatum, concolor, pilis albidis vestitum. Stipes centralis, disci diametro brevior, prope basin saepe laevis. Pili 60-90 x 2.5-3.0 µm, hyalini, cylindrici, flexuosi, obtusi, muris tenuibus, septati, omnino tenuiter granulati, particulas resinosi succinicoloris gerentibus. Asci 90-100 x 7-8 µm, 8-spori, apice conici, poro in Melzero caerulescente. Ascosporae 13-20 x 2.2-2.8 µm, hyalinae, fusoideae, guttulae serialae continens, non-septatae. Paraphyses cylindrici, raro angusti lanceolati, apice saepissime acuti, septati, hyalini, 2.0-2.5 µm diam. Excipulum ectale hyalinum 25-30 µm crassum, e cellulis angusti prismaticis, 12-20 x 3-4 µm, muris tenuis vel leviter incrassatis, in seriebus superficiei parallelis dispositis sistens.

DERIVATION: Named in honour of Sven Berggren, collector of the type material.

This collection by Berggren is partially annotated by Cooke and has been previously determined as Dasyscypha nivea, from which it is clearly distinct in the larger spores and completely granulate hairs. Apothecia occur on fragments of undetermined bark and are, unfortunately, in a comparatively poor state of preservation. Dried apothecia are frequently a unicolorous orange-brown, and the hairs are difficult to observe. The structure of the excipular tissue is also difficult to interpret, the hyphae now being collapsed and compacted, and further collections are required to confirm or amplify the description given above. The ectal cells are prismatic and more or less thin-walled and the structure appears to be typical of the genus. Fortunately, the apothecia are fully mature and yield abundant spores, and the species should prove readily recognizable. It is distinguished by the fusoid spores, narrow paraphyses and hairs bearing abundant particles of yellowish-brown, resinous matter.

Lachnum berggrenii is perhaps related to L. lachnoderma, but has shorter and broader, non-septate spores and narrower paraphyses. The spores are remarkably similar to those, of L. filiceum, but that is a distinctive species occurring exclusively on ferns and having shorter, unencrusted hairs and lanceolate paraphyses.

NEW ZEALAND: Waitaki, on undetermined bark, undated, leg. Berggren 286 (Holotype, K).

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Lachnum berggrenii Spooner 1987
Lachnum berggrenii Spooner (1987)
Lachnum berggrenii Spooner 1987
Lachnum berggrenii Spooner 1987
Lachnum berggrenii Spooner 1987
Lachnum berggrenii Spooner (1987)
Lachnum berggrenii Spooner 1987
Lachnum berggrenii Spooner (1987)

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Lachnum berggrenii Spooner 1987
[Not available]

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taxonomic status
Phylogenetically a species of Erioscyphella [PRJ, Aug 2019]
typification
NEW ZEALAND: Waitaki, on undetermined bark, undated, leg. Berggren 286 (Holotype, K).

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1cb18fe7-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
15 December 2003
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