species fungus family described new science found north_america washington idaho montana wyoming new_mexico found china known result accidental introduction natural fruit bodies roughly conical cap tall wide surface vertically arranged pits cap initially yellowish brownish black maturity stipe white hollow measuring high wide species adapted western north_america reliably distinguished use dna analysis taxonomy originally identified phylogenetic species species rich clade brown donnell colleagues publication specific epithet alludes preliminary distinguishable physical ecological characteristics clearly genetically distinct species differentiated comparing dna sequences restriction fragment length analysis thought driving evolutionary force caused ancestors roughly million years ago original specimens collected obtained research effort designed improve understanding north american description fruit bodies high conical cap high wide widest point cap surface features pits ridges formed intersection primary vertical ridges frequent shorter secondary vertical ridges occasional sunken horizontal ridges cap attached stipe deep wide ridges smooth finely covered densely initially pale tan dark grayish brown maturity eventually nearly black flattened young eroded maturity pits somewhat elongated vertically smooth brownish yellowish tan pinkish buff whitish pale brownish stipe long wide roughly equal width length slightly club shaped near base surface smooth covered whitish flesh whitish measuring thick hollow cap layered base stipe sterile inner surface cap whitish covered short soft hair elliptical smooth typically measuring spore bearing cells spored hyaline translucent cylindrical measure cylindrical measure tips shaped rounded club shaped fuse shaped contents hyaline translucent brownish potassium hyphae sterile cap ridges measure terminal cells shaped similar brownish contents north american generally considered choice edibility mentioned original description similar species indistinguishable species clade including distinguished habitat distribution found non burned forests western north_america found east rocky_mountains restricted northern distribution northward eastern north_america grows burn sites indistinguishable subtle differences structure sterile ridges species authors confident specimens examined establish differences consistent habitat distribution ecology saprobic mycorrhizal different times life cycle fruit bodies grow partially burned forests particularly dominated douglas fir pine tend appear great numbers year immediately following fire appear decreasing frequency successive years fruiting occurs april july elevations distribution includes washington idaho montana wyoming found china remains unclear dispersal distant locations occurred naturally accidental introduction humans identified phylogenetic species shown non native species increasing overall growth grass abundance seeds tolerance extreme heat contributing factor success invasive species western north_america
Morchella sextelata