1. A poisonous gyromitra; the surface of the fertile body is smooth at first and becomes progressively undulating and wrinkled (but never truly pitted); colour varies from dull yellow to brown
   "The brain mushroom's wrinkled surface resembles a brain";
   - Gyromitra esculenta, beefsteak morel

Derived forms: brain mushrooms

Type of: gyromitra

Part of: genus Gyromitra