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Russula alnetorum : ウィキペディア英語版 | Russula alnetorum
''Russula alnetorum'' is a species of mushroom in the genus ''Russula''. The fruiting bodies are found growing on the ground in the vicinity of alder trees with which this fungus has a symbiotic relationship. The cap is purple and the gills and stem white, darkening with age. ==Description== The cap of this medium-sized ''Russula'' is usually between in diameter. It is convex at first, then flattening out and developing a depression in the centre, and the flesh is thin and fragile. The margin is blunt, smooth at first but later becomes serrated and knobbly. The cap is dark purple in the centre, sometimes with greyish-brown spots, and paler purple near the rim. The gills are white, turning greyish with age, partially attached to the stem and about broad. The spore print is white. The stem is usually long but may sometimes reach . It is brittle, with spongy flesh, and hollow with two to four partitions. It is cylindrical, becoming thicker near the base, white at first, but becoming yellowish and eventually grey with age. This fungus is almost odourless, or has a slightly fruity smell.
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