Noun | 1. | ![]() fungus genus - includes lichen genera morel - any of various edible mushrooms of the genus Morchella having a brownish spongelike cap common morel, Morchella esculenta, sponge morel, sponge mushroom - an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges family Helvellaceae, Helvellaceae - family of false morels or lorchels; some are edible and some are poisonous |