Morchella

Habitats favorable to fruition

Morchella species appear to have either symbiotic mycorrhizal relationships or act as saprotrophs.[19][16] Yellow morels (Morchella esculenta) are more commonly found under deciduous trees rather than conifers, and black morels (Morchella elata) can be found in deciduous forests, oak and poplar.[20] Deciduous trees commonly associated with morels in the northern hemisphere include ash, sycamore, tulip tree, dead and dying elms, cottonwoods and old apple trees (remnants of orchards). The fruiting of yellow morels in Missouri, USA, was found to correlate with warm weather, precipitation, and tree species, and most usually in the springtime (April-May time frame).[21]

Morels in western North America are often found in coniferous forests, including trees in the genera Pinus, Abies, Larix, and Pseudotsuga, as well as in cottonwood riparian forests.[22]