Hohenbuehelia atrocoerulea - A hat with a diameter of 2-5 cm, shell-shaped, semi-circular, kidney-shaped or fan-shaped. In young fruiting bodies the tip is convex and attached to the ground. The elderly have a short stem. Fairly variable surface, blue-black, gray-brown, olive or red-brown, sometimes whitish with a blue-gray shade
Lamellae initially white, then creamy yellow, forked.
Stem very short, lateral, full.
Off-white pulp, with a floury smell and taste. There is a jelly-like film under the cap's skin, forming a black line when dried.
Occurrence: Europe, South and North America