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Family: NectriaceaeGenus: Neonectria
Anamorph: conidiomata absent. Conidiophores unbranched, sometimes verticillate, becoming loosely to moderately densely branched. Conidiogenous cells 10-35 µm long and 1.5-3 µm broad at the base, cylindrical and slightly tapering towards the tip or narrowly flask-shaped with the widest point in the middle, proliferating percurrently. Conidia formed abundantly on slimy heads, variable in size but usually (30-) 50-80 x 5.5-7 µm, cylindric-ellipsoidal to cylindrical, straight or slightly curved with rounded ends, 1- to 5-septate, thin-walled, hyaline, smooth, without a gelatinous sheath or appendages.
Teleomorph: stromata to 0.3 mm high and 8 mm diam., erumpent through the epidermis, pinkish to orange-brown. Ascomata perithecia, superficial on the stroma, in compact clusters of up to ca 30, 200-250 (-350) µm diam. and 220-300 µm tall, subglobose to pyriform, dark pinkish red, sometimes cupulate upon drying or collapsing by lateral pinching, papillate, the region immediately around the ostiole sometimes slightly darker, KOH+ purple, LA+ yellow, surface smooth or minutely roughened. Peridium 20-40 µm thick, with an outer layer of thick-walled pigmented globose to angular cells and an inner layer of ± hyaline thin-walled angular cells. Interascal tissue well-developed, composed of chains of very thin-walled ellipsoidal cells, evanescent at maturity. Asci 70-95 × 9-13 μm, cylindrical to narrowly clavate, short-stalked, the apex obtuse to rounded, thin-walled, not fissitunicate, with a very inconspicuous hardly refractive thickened ring at the apex, not blueing in iodine, 8-spored. Ascospores uniseriate or obliquely biseriate near the ascus apex, 12-14.5 x 4-6.5 µm, ellipsoidal to broadly fusiform with narrowly rounded ends, straight or slightly curved, 1-septate, hardly constricted at the ± median septum, hyaline to pale yellow, thin-walled, finely roughened, without an epispore or gelatinous sheath.