Mycena acicula (Oranje dwergmycena (BE) / Orange Bonnet (EN) / Orangeroter Helmling (DE) /Mycène rouge orange (FR) ) is a species of mushroom in the Mycenaceae family. This beautiful, tiny Mycena usually causes no trouble in identification. It is characterized by the small size (cap 2-8 mm broad), the orange-red pileus, the 9 - 16 white to yellow lamellae reaching the orange-yellow to yellow stipe wich is usually about up to 35 x 0.5 mm. It is mostly found on fallen twigs, plant debrise, and decayed wood of deciduous trees, mostly in humid places from early summer to late autumn.
Compared to the dull hues of most Mycenas, Mycena acicula is a visual treat, the tiny caps bright reddish-orange, complemented by a yellowish stipe. What adaptive value the brilliant coloration conveys if any, is unclear, but it is a character shared by a small number of Mycenas.
Image: Visé (BE) - 11/09/2010
© Johan Dierckx
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