The yellow flowerpot mushroom (Leucocoprinus birnbaumii) is small, though it stands out for its full yellow colour and for growing in fleets. The cap displays first a closed ovoid shape, 23-28 mm in height by 18-20 mm in diameter, with scales on its surface; later it opens like an umbrella until conical shape keeping the central nipple. In parallel, the bright yellow fades as the mushroom ages. The stipe can reach 60 mm height; it is solid and thick. The stipe wears a whitish ring in its upper part that comes from the partial veil that covered the gills. The stipes of several fruiting bodies often merge in a thick base.
The yellow flowerpot mushroom belongs to the agaricaceae family, that of the common white mushroom (Agaricus bisporus), although it is a very toxic species.
The yellow flowerpot mushroom is a newcomer species from tropical origin that, as its name indicates, appears in pots from the plant substrate. In the picture, the yellow mushroom has appeared on a flowerpot containing a seedling of green oak.
[photo Josefina Suàrez]