The fruit bodies of Morchella are highly polymorphic, varying in shape, color and size, while in many cases, they do not exhibit clear-cut dichotomous features microscopically; this has contributed to uncertainties regarding taxonomy.[2] Discriminating between the various species is further complicated by uncertainty regarding which species are truly biologically distinct. Some authors have suggested that the genus only contains as few as 3 to 6 species,[3][4][5] while others recognise up to 50.[6][7][8] Mushroom hunters mostly refer to them by their color (e.g., gray, yellow, black) as the species are very similar in appearance and can vary considerably within species and age of individual. The genus is currently undergoing extensive reevaluation with regards to the taxonomical status of many species.