Morchella semilibera

General: Formerly Mitrophora semilibera, recently transferred to Morchella, fruiting in grass along riverbanks and stream margins, up to 18 cm high; cap small relative to stipe, greyish-brown with longitudinal and transverse ribs forming alveoli, attached only to the upper half of the hollow white stipe.

Asci: Cylindrical, hyaline, 8-spored, uniseriate, 250-320 x 15-20 µm, inamyloid in Melzer's reagent.

Paraphyses: Cylindrical, hyaline, septate, 3-4 µm wide, apices swollen to 8-12 µm, not projecting beyond asci.

Ascospores: Ovoid to ellipsoid, smooth, hyaline, 22-27 x 14-16 µm, contents homogeneous without oil guttules.