species fungus family described north_america occurs gardens beds urban settings northern california pacific northwest region united_states canada fungus reported turkey spain france switzerland canada china unknown result accidental introductions considered choice edible mushroom fruit bodies develop distinctive ladder like pattern pits ridges surface conical caps taxonomy officially described new north american species resulted type locality washington previously identified phylogenetic species publication erroneously classic north american black described specific epithet means refers habit causing distress territory invaded argued recent study richard probably later synonym old european taxon description fruit bodies high cap high measures wide widest point conical widely conical occasionally egg shaped surface pits ridges primary vertical ridges numerous horizontal ridges creating appearance cap attached stipe deep wide ridges smooth finely colored pale dark gray young dark grayish brown nearly black age rounded young later eroded pits vertically elongated stages development smooth finely texture pits open development progressing gray dark gray immature grayish brown grayish olive brownish yellow maturity stipe measures high wide somewhat thicker near base whitish pale brownish surface smooth finely whitish develops longitudinal ridges grooves particularly near base fruit body matures flesh whitish tan measuring thick hollow cap stipe tissue arranged chambers layers sterile inner surface cap whitish covered short soft hair elliptical smooth measure cylindrical hyaline translucent spored measuring measuring cylindrical shaped tips rounded roughly club shaped fuse shaped elements sterile ridges measure terminal cells cylindrical rounded tip shaped similar terminal cells hyaline brownish potassium member group black sought choice edible mushroom raw poisonous cooked similar species rare pacific_northwest known type collection similar appearance species distinguished finely surface habitat distribution ecology saprobic fungus fruit bodies grow wood chips gardens urban areas suggests mycorrhizal tendencies grown environment trees known primarily northern california pacific northwest region united_states reported british_columbia canada california washington nevada oregon isolated reports eastern north_america fruiting occurs spring march identified phylogenetic species found turkey china remains unclear dispersal distant locations occurred naturally accidental introduction humans
Morchella importuna