蜜环菌（学名：Armillaria mellea），又名榛蘑、臻蘑、蜜蘑、蜜环蕈、栎蕈，分布于全球各地区，为小皮伞科植物，也是偶见木栖腐生或木栖寄生的野菇之一种。该种黑色菌素生长于春天与秋天的低中海拔林区，数天生，肉质软韧质，菌盖2cm－8cm宽，全株可食。

野生蜜环菌是中国吉林长白山和黑龙江兴安岭山区特有的山珍之一，是极少数不能人工培育的食用菌之一。

蜜环菌具有一种特别的鲜美味道。东北名菜小鸡炖蘑菇，就是采用东北地区当地的蜜环菌以及农家散养的土鸡烹饪，是东北人招待贵客的著名佳肴。蜜环菌含有人体必需的多种氨基酸和维生素，经常食用可加强肌体免疫力，益智开心，益气不饥，延年轻身等作用。

Armillaria mellea, commonly known as honey fungus, is a basidiomycete fungus in the genus Armillaria. It is a plant pathogen and part of a cryptic species complex of closely related and morphologically similar species. It causes Armillaria root rot in many plant species and produces mushrooms around the base of trees it has infected. The symptoms of infection appear in the crowns of infected trees as discoloured foliage, reduced growth, dieback of the branches and death. The mushrooms are edible but some people may be intolerant to them. This species is capable of producing light via bioluminescence in its mycelium.