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 Add this item to the list  817803 Original description
   
Description type:Original description 
Description:Stromata 0.5–6.5 mm long, 0.6–1.5 mm high, variable, with an inconspicuous or conspicuous ectostroma projecting up to 1 mm from the host surface, consisting of dark red or orange (2.0–) 3.0–5.2(–7.0) μm (n = 54) wide, thin-walled hyphae, turning purple in 3 % KOH and bright yellow in lactic acid and 40 % glycerol; containing ascomata and/or pycnidia in variable, mostly valsoid configuration. Ascomata (330 – )380 – 550( – 630) μm high, (340 – )380 – 550( – 615) μm wide (n = 20), globose or depressed globose, black. Peridium (26–)34–51(–60) μm (n = 20) wide, comprising a t. angularis to t. epidermoidea of thin-walled cells (2.5–)4.5–15.5(–22) × (1.5–)3.0–8.2(–12.5) μm (n = 30), compressed inside, becoming more isodiametric, thicker-walled and darker towards the surface, surrounded by a layer of dark brown hyphae followed by red stromal hyphae. Ostiolar discs (140 – )155 – 343( – 415) μm wide, bright to dull red or orange, paler to greenish-yellow with age, not projecting, with a radial to stellate structure in surface view, sometimes with a black pulvinate spore deposit; consisting of small-celled, hyaline to pale brownish t. angularis terminating in short, vertically arranged, thick-walled hyaline hyphae, in the central upper area incrusted by yellow to orange-brown pigment dissolving and diffusing in 3 % KOH and lactic acid, purplish in the former and bright yellow in the latter; often surrounded by yellowish, whitish, orange or pale brownish mycelium. Ostiolar canal (156–)205–355(–420) μm long, interior (62 – )759 – 122( – 154) μm wide (n = 20), periphysate. Hamathecium of narrow branched and anastomosing, trabeculate, 1.5 – 3.5 μm wide pseudoparaphyses and some true paraphyses of similar width with free ends among immature asci. Asci (105–)108–125(–140) × (8.2–)8.7–10.5(–11.5) μm (n = 21), cylindrical, bitunicate, fissitunicate, but relatively stable in water mounts, with thick endotunica, small ocular chamber, short stipe and furcate base, containing 8 uniseriate, partly overlapping ascospores. Ascospores (12.8 – )15.0 – 18.2( – 21.2) × (5.0 – ) 5.7–6.7(–7.2) μm, l/w (2.1–)2.4–3(–3.5) (n = 91), narrowly ellipsoid or oblong with narrowly or broadly rounded ends and second cell sometimes slightly widened, 3 thick and dark eusepta, slightly constricted at all septa, straight or slightly curved, yellowish brown when young, turning dark chocolate to blackish brown upon maturation, multiguttulate, with finely verruculose perispore, sheath absent, unchanged in 3 % KOH.
Asexual morph on the natural host: Pycnidia (290 – ) 430–695(–840) μm high, (335–)500–930(–1210) μm diam (n = 20), immersed in valsoid configuration, often together with ascomata in red or orange mycelium, depressed globose to nearly conical. Ostiolar discs as with ascomata, ca. 0.2–0.4 mm diam outside, ostiolar canal ca. 0.2–0.4 mm long. Pycnidial wall similar to the ascomatal wall, (20–)26–42(–47) μm (n = 20) thick, comprising a dark brown t. angularis of thick-walled, inhomogeneously pigmented cells (3.0 – ) 4.0–9.5(–13.0) × (2.7–)3.0–6.8(–9.6) μm (n = 40); surface turning purple in 3 % KOH. Interior lined by hyaline thin-walled isodiametric cells, giving rise to highly variable, ampulliform to lageniform, cylindrical or oddly shaped hyaline phialides (5.7–) 7.3–11.8(–15.0) × (2.7–)3.3–4.7(–5.3) μm (n = 30), producing cylindrical, oblong to ellipsoid, 1-celled conidia (5.3 – ) 5.8–6.7(–7.2) × (2.8–)3.0–3.2(–3.5) μm l/w (1.7–) 1.9–2.2(–2.4) (n = 30), first hyaline, turning dark brown, smooth.
Cultures and asexual morph in culture: On CMD at 22 °C colony radius 13–18 mm after 1 mo, colony with irregular outline, purple, vinaceous to violaceous, margin hyaline, thin, odour indistinct to slightly fruity. Hyphae submerged in agar partly orange or dark red; pigment encrusted, turning purple to violaceous and dissolving in 3 % KOH leaving hyphae smooth and colourless. Depending on the isolate, pycnidia absent or forming after 1 – 2 mo, 0.3 – 0.8 mm diam, globose with a prominent papilla releasing olivaceous or brown conidial drops, black, densely surrounded by radial orange hairs. Peridium dark brown, pseudoparenchymatous, inhomogeneously pigmented, containing dark brown granules. Phialides originating on more or less globose hyaline cells, (8 – )9 – 14.5( – 16) × (2.8 – ) 3.0 – 4.0( – 4.3) μm (n = 13), mostly lageniform to cylindrical, often with a swollen base, sometimes on an intercalary, more or less cylindrical cell. Conidia (2.0 – )4.5 – 6.0( – 6.5) × (2.0 – ) 2.7–3.5(–4.0) μm, l/w (1.0–)1.4–2.1(–2.5) (n = 41), first hyaline, turning medium brown, oblong, ellipsoid, subglobose or rhomboid with one end often truncate, smooth, with 1 – 3 guttules. On MEA at 22 °C colony radius up to ca. 25 mm within 1 mo, colony vinaceous and covered with a whitish mat of aerial hyphae; odour mushroomy; no pycnidia produced after 1 – 2 mo.
 
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