Morchella capitata

https://www.mushroomexpert.com/Morchella_capitata.html

Ecology: Possibly saprobic and mycorrhizal at different points in its life cycle; appearing in lightly burned spruce and fir forests in Oregon, and possibly in conifer burn sites throughout western North America, in the spring or summer following the fire.

Cap: 4-8 cm tall and 2.5-8 cm wide; conical or nearly so, but occasionally egg-shaped or nearly round; pitted and ridged, with the pits primarily arranged vertically by maturity; when young with bald or finely velvety, flattened, olive green or brownish ridges and pits; when mature with flattened to sharpened or eroded, dark brown to black ridges and brownish to tan pits; attached to the stem with a small groove (1-7 mm deep); hollow.

Stem: 2.5-5 cm high and 2-5 cm wide; equal, or sometimes becoming somewhat swollen at the base; whitish to pale brownish; bald or finely mealy with granules; chambered and layered inside (often densely so), even when young.

Microscopic Features: Spores 18-25 x 12-17(-19) ; smooth; elliptical; without oil droplets; contents homogeneous. Asci 8-spored. Paraphyses cylindric with clavate, subfusiform, or merely rounded apices; septate; hyaline to brownish in KOH. Elements on sterile ridges 75-200 x 10-35 ; septate; brown in KOH; terminal cell usually subcapitate, capitate, or dramatically capitate (strongly swollen and subglobose) but occasionally clavate or merely cylindrical with a rounded apex.

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