Leptomelanconium asperulum

Leptomelanconium asperulum (Moesz) Petr., in Sydow, Annls mycol. 21(3/4): 179 (1923).

≡ Melanconium asperulum Moesz, Bot. Közl. 14(5-6): 157 (1915).

           Index Fungorum number: IF 212573; Facesoffungi number: FoF 11387, Fig. xx

Description:

Saprobic on needles of Pinaceae. Sexual morph: Unknown. Asexual morph: Conidiomata 395–400 μm diam., 379–400 μm high, acervular, subepidermal or immersed, erumpent at maturity, solitary or gregarious, sometimes confluent, globose, unilocular. Conidiomata wall 35–55 μm, comprising thin-walled, pale brown cells of textura angularis. Conidiophores 15−30 × 2.1−4.4 µm (x̄ = 16.3 × 4.0 µm, n = 20), reduced to conidiogenous cells, sometimes cylindrical to filiform, unbranched or branched at the base, septate, hyaline to pale brown, smooth walled, formed from the upper pseudoparenchyma. Conidiogenous cells 21−25 × 4.1−5.6 µm (x̄ = 23.5 × 4.7 µm, n = 20), holoblastic, annellidic, cylindrical, discrete or integrated, indeterminate, pale brown, verruculose. Conidia 9.5−11 × 3.4−5.0 µm (x̄ = 10.4 × 4.1 µm, n = 20), cylindrical or ellipsoid, navicular to clavate, with a truncate base, 0–1-septate, continuous brown, thick-walled, verruculose.

Material examined: Germany, Kamm des Riesengebirges near Prinz-Heinrich-Baude 47.783333 10.016667, on Pinus mughus (Pinaceae), August 1922, H. Sydow (Syd. Myc.germ.2000).