Mycena citrinovirens
Mycena citrinovirens
Description
Hypha of the pileipellis and cheilocystidia.
Basidia, spores and hypha of the cortical layer of the stem.
Cap 6-12 (-21) mm across, cylindrical or more or less hemispherical when young, then conical to parabolical, occasionally with a small umbo; translucent-striate, sulcate, dry, glabrous, pale yellow to greenish yellow or olivaceous, or with olivaceous centre and paler, yellowish margin; drying to pale yellow all over. Gills 12-19 reaching the stem, adnexed, occasionally with a short decurrent tooth, becoming slightly intervenose with age, yellowish to cream or pale grey to white, with concolorous edge. Stem 50-65 x 1-1.5 mm, cylindrical, firm, equal, glabrous except for the pruinose apex, above whitish or pale grey, darker grey to brownish below, occasionally with a yellow component; base densely covered with long, coarse, flexuous, whitish fibrils. Odour indistinct. Taste not recorded. Basidia 30-36 x 6.5-8 µm, clavate, 2-spored, with sterigmata 8-9 µm long, more rarely 1-spored. Spores 8.5-11.2 x 6.2-8.2 µm, Q = 1.2-1.6, Qav Å1.4, broadly pip-shaped, weakly amyloid. Cheilocystidia 15-40 x 6.5-17 µm, forming a sterile band, clavate,, covered with unevenly spaced, simple or occasionally furcate, cylindrical, straight to curved excrescences 1.5-8(-20) x 1-2 µm. Pleurocystidia absent. Lamellar trama dextrinoid. Hyphae of the pileipellis 2.5-3.5 µm wide, densely covered with simple to furcate, cylindrical excrescences 2-4.5 x 0.5-1 µm, somewhat gelatinized. Hyphae of the cortical layer of the stem 1-2.5 µm wide, covered with simple, cylindrical excrescences 1-6.5 x 0.9-1.3 µm. Clamps absent, or with some more or less abortive clamps.
Ecology and distribution
Scattered to gregarious on needles under Juniperus communis. Occasionally solitarily on small Juniperus twigs. Late autumn. Rare and local, or possibly overlooked. Only with certainty known from Greenland and southern Norway.
