Coprinopsis spelaiophila/Ivoorinktzwam

Description:

Pileus: 13×15 mm; campanulate, sulcate; covered with large, white, filamentose-floccose velum remnants, which lie loosely on the pileus; white-grey with slightly browner centre, darker grey towards the margin.

Lamellae: Numerous, crowded, fairly broad when young; first pale, then grey, later black, with grey floccose margin when young; deliquescent.

Stipe: 70×3-4 mm; cylindrical, flexuous, slightly tapering towards the top, entirely covered with fine erect fibrils, sericeous underneath; white.

Context: Thin, clear division of pileal and stipe context; white, darker in the foot and around the centre at the apex; hollow in the stipe.

Smell/Taste: Smells mushroomy, no taste recorded.

Microscopy: Spores av. 9,18×6,12 µm (measurements: 1000x, oil-immersion, H2O, 1 sd = 1,02 micron, n=10); very broadly fusiform to amygdaliform met acute apex; chocolate brown, hyaline; Basidia: 4-sterigmate; Pleurocystidia: 70 µm, ellipsoid-ovoid, scarce, hyaline; Cheilocystidia: not measured, globose to ellipsoid-ovoid, hyaline; Velum: long chains of sausage-shaped cells, sometimes bloated, sometimes branched with sporadically fine encrustation.