is a specific kind of: mushroom.

is a broader term that covers: common morel, Morchella esculenta, sponge morel, sponge mushroom | cup morel, Disciotis venosa | bell morel, Verpa | black morel, conic morel, Morchella angusticeps, Morchella conica, narrowhead morel | Morchella crassipes, thick-footed morel | cow's head, half-free morel, Morchella semilibera.

is a member of: genus Morchella, Morchella.