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Mycena kuehneriana A. H. Sm.

Lucr. Conf. nat. Stinta Solului: 190 (1947).


 

Known to grow in oak woods in the United States and Canada. In Europe recorded in both deciduous and rich Picea dominated forests. In Norway there is one record under Fagus. (Aronsen 1986: 169-174). Autumn.

Pileus 10-20 mm across, campanulate to convex, flattening with age and becoming more or less depressed at the centre, translucent-striate, hygrophanous, glabrous, pale brown, more or less with a pinkish-lilaceous tinge, fading to almost white, the margin concolorous to paler. Lamellae 20-28 reaching the stipe, arcuate to sub-horizontal, broadly adnate, far decurrent, white with a pink-liac shade, the edge concave, concolorous or somewhat paler. Stipe 20-40 x 1.5-4 mm, hollow, fragile, equal or somewhat widened above and below, straight, terete to somewhat compressed, minutely puberulous above, glabrous for the greater part, concolorous with or somewhat paler than the pileus, the base covered with coarse, whitish fibrils. Odour and taste raphanoid.

Basidia 22-27 x 6.5-7 µm, clavate, 4-spored, with sterigmata 4.5-5.5 µm long. Spores 7.2-9.0 x 3.6-4.5 um, pip-shaped to subcylindrical, amyloid. Cheilocystidia 30-75 x 9-18 µm, forming a sterile band, fusiform, clavate, utriform, subcylindrical, smooth, apically broadly rounded or somewhat attenuated. Pleurocystidia similar. Lamellar trama dextrinoid. Hyphae of the pileipellis 3-9 µm wide, smooth. Hyphae of the cortical layer of the stipe 2.7-4.5 µm wide, smooth, caulocystidia 22-70 x 5.5-14.5 µm, fusiform, clavate, cylindrical, with rounded to acute apex. Clamp connections present in all tissues.

Mycena kuehneriana belongs to sect. Calodontes (Fr. ex Berk.) Quél. subsect. Purae (Konrad & Maubl.) Maas Geest. together with M. diosma Krieglst. & Schwöbel, M. pura (Pers.) P. Kumm. and M. rosea (Schumach.) Gramberg, characterized by lamellae with a pale edge, amyloid spores and pleurocystidia present. It looks quite similar to M. pearsoniana and the two species may be hard to distinguish in the field, but the latter has non-amyloid spores and no pleurocystidia.

Apparently M. kuehneriana is a rare and poorly understood species known only by a few collections from North America and several European countries.

Aronsen, 1986 (Agarica 7 (14): 169-174) in extensio:

 

 

© Arne Aronsen 2002-2015