Mycena aurantiomarginata
Mycena aurantiomarginata
- Innhold
- Description
- Ecology and distribution
Description
1. Hyphae of the pileipellis, 2. Cheilocystidia, 3. Spores, 4. Caulocystidia.
Cap 10-25 mm across, conical to parabolical, flattening with age, becoming convex to plane, with or without umbo, shallowly sulcate, translucent-striate, glabrous, hygrophanous, grey-brown, olivaceous brown to fairly dark brown with the margin orange to orange-yellow. Gills 16-26 reaching the stem, ascending, adnexed, decurrent with a short tooth, pale yellowish grey to greyish beige with bright orange to pale orange-yellow edge. Stem 35-80 x 1-2 mm, firm, cylindrical, entirely pruinose when young, glabrescent except for the apex, whitish to yellowish at the apex, yellow brown to dark brown farther down or also orange yellow near the base, sometimes tinged with yellowish or orange shades; the base densely covered with yellow to orange fibrils. Odour sweet, fruity, often experienced as farinaceous or faintly of anise. Basidia 24-33 x 5.5-8 µm, slender-clavate, 4-spored. Spores 7.5-10.5 x 4-5.5 µm, Q = 1.7-2.1, Qav ˜ 1.9, elongated pip-shaped to subcylindrical, amyloid. Cheilocystidia 18-42 x 7-17 µm, forming a sterile band, variable shape but often clavate to obpyriform, long- to short-stalked, with orange contents, covered with fairly numerous, evenly spaced, simple, cylindrical excrescences 1-3 x 0.5-1 µm. Pleurocystidia similar. Lamellar trama dextrinoid. Hyphae of the pileipellis 1.5-5.5 µm wide, densely covered with simple to branched excrescences 1-24 x 1-3 µm, forming dense masses and tending to become somewhat gelatinized. Hyphae of the cortical layer of the stem 1.5-3.5 µm wide, smooth to sparsely diverticulate, excrescences simple to furcate 1-9 x 1-1.3 µm, terminal cells 4.5-10 µm wide, simple to variously branched, subcylindrical to clavate, almost smooth to densely diverticulate. Clamps present in all tissues.
Ecology and distribution
Generally associated with conifers, Picea, Pinus, Juniperus, growing in needle beds, but occasionally found in deciduous woods. Summer to late autumn. Widespread in southern parts of Norway, found north to Troms.