Nectria cinnabarina

On decaying small twigs of broadleaf trees on the ground, with globose perithecia 0.2–0.4 mm in diameter bearing an apical papilla, rough and glossy surface, cinnabar-red to reddish-brown, clustered in dense caespitose bunches of numerous individuals, densely packed together, colonising entire branches.

Peridial wall hyphae with a textura angularis, irregular, very thick-walled (walls up to 1.5 µm thick), with abundant orange interparietal pigment, measuring 10–25 µm long, reacting with an intense deep blue colour in KOH.

Asci cylindrical to clavate, inoperculate, 8-spored, measuring 75–90 µm long by 8–12 µm wide, with spore arrangement varying from uniseriate to irregularly biseriate, inamyloid in Melzer's reagent.

Paraphyses not observed.

Ascospores cylindrical-ellipsoidal to slightly fusiform, smooth, hyaline, thin-walled, measuring 14–20 µm long by 5–7 µm wide, mature spores with one median septum and a very slight constriction at the septum, usually containing two coarse oil droplets inside (one in each cell).