Coprinopsis atramentaria, commonly known as the common ink cap, inky cap or alcohol inky cap, is poisonous when combined with alcohol. It is a medium-sized conical agaric, that is greyish brownish, later blackening and dissolves itself in a black ink-like liquid at maturity. It grows generally in tufts, in fields, gardens and waste ground, near broad-leaf tree stumps or buried wood.
egg-shaped, expanding to become slightly umbonate with age. The colour is gray to gray-brown. Flesh is white, hollow and medium in young specimens but soon discolors and deliqueces slowly from the margin. Gills
free, extremely crowded and edged with white. Spores
are black. Stem
is white and smooth with fine, reddish brown fibrils at base.
Coprinus insignis has warty spores. Coprinus micaeus is smaller and more fragile. It granulates when young.
on the First Nature Web site.
on the MushroomExpert.Com Web site.