Leucocoprinus viridiflavus

Leucocoprinus viridiflavus is a small dapperling mushroom with thin yellow flesh (up to 4mm thick at the central disc) that discolours olive or green when damaged or cut. Petch described Lepiota viridiflava as follows: Cap: Up to 2.5 cm wide, umbonate and almost planar when expanded. The surface colour is greenish-yellow or sulphur-yellow and is coated in thin dark green patches and specks which may appear sticky when moist or shiny when dry. The central disc or umbo is a darker green than the rest of the surface. As opposed to most Leucocoprinus species which display striations at the cap edges this species is said to have an appendiculate margin, with pieces of the partial veil hanging from the cap edges. Stem: 2.5–3 cm tall and 3mm thick tapering upwards from a slightly wider base. The surface is greenish-yellow or sulphur-yellow similar to the cap and is fibrillose with dark green fibers towards the base. The interior is hollow with white fibers and yellow flesh. Gills: Free, crowded and likewise greenish-yellow or sulphur-yellow with green bruising. Spores: Ovoid and pale yellow. 5-8 x 3-4 μm. The 2009 description of Leucoagaricus viridiflavus is similar but expands on these details: Cap: 1.1-2.9 cm wide, conical or convex when young expanding to convex or applanate when mature. …

Leucocoprinus viridiflavus is scarcely recorded and little known. The specimens described by Petch were found on the ground in flower beds in Peradeniya, Sri Lanka whilst the specimens described by Kumar and Manimohan were found in Kerala state, India where they were scattered or solitary on soil amongst decaying Acacia leaves. It was noted as appearing regularly around the Calicut University campus immediately after heavy rains during dry periods.