Notes:
This fairly well-recognizable species was high on my wishlist for a long time, especially after seeing Leucoagaricus americanus for the first time in my life this year. It is rather rare in the Netherlands and is listed as Threatened on our national Red List (Arnolds & Veerkamp, 2008).

Distribution in the Netherlands:
https://www.verspreidingsatlas.nl/0077010

Description MHCB-17080903:

Pileus: 52 × 10 mm; convex, somewhat undulating outerhalf; very finely pubescent, reddish brown centre, grey brown outerhalf; bruises blood red very rapidly, turns brown within few minutes; green with ammonia.

Lamellae: l:3-7; crowded, free, pseudocollarium(?); margins finely fimbriate and darker; remarkably brittle; white.

Stipe: 68 × 6 (11) mm; central, clavate with bulbous base; pruinose apex superior from annulus, very finely pubescent inferior from annulus; annulus small, ring-shaped, more or less the “top of a sock”, seems to be stretched and covering entire lower half of the stipe; dark reddish brown lowser half, due to the fine, but dense pubescence on a pallid pinkish bown surface with completely white utmost apex; bruises bloodred instantly, then brown.

Context: Soft, marshmallowy, sericeous on the section in the stipe, except for in the base, there the same marshmallowy structure/texture as in pileus and thus mat; distinct line directly above hymenium; hollow in the stipe; weak bruising on section; whitish.

Smell/Taste: Feintly sweetish, mushroomy smell, but very weak; mild to indistinguishable taste.

Microscopy:
*sporae: 8 × 4 µm; frontally ellipsoid, laterally flattened or constricted above half; 1-4 guttules.
*cheilocystidia: irregularly shaped, sometimes with crystals at top.

Ecology: Humus rich sandy soil in Fagus sylvatica dominated old dune woodland, between thick layer of leaflitter; sharing habitat with Leucoagaricus sericifer (MHCB-17080903).

Images

collage_20170810195149636.jpg
collage_20170810194516481.jpg
DSC_1652.jpg
DSC_1658.jpg
DSC_1790.jpg

Proposed Names

83% (1)
Recognized by sight: Lepiotoid-agaricoid habitus, fine, reddish brown fibrils, dense at the centre, sparser towards the margin of the pale pileus, clavate, annulate stipe, bruising blood red instantly, green reaction to ammonia on pileipellis.
Used references: – Knudsen, H. & Vesterholt, J. (2008). Funga Nordica
- Breitenbach, J. & Kränzlin, F. (1995). Pilze der Schweiz Band 4
Based on microscopic features: See notes
Based on chemical features: Green reaction to ammonia on pileipellis

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus

Comments

Add Comment
No one has commented yet.

Created: 2017-08-29 16:40:16 CDT (-0400)
Last modified: 2017-08-29 16:40:20 CDT (-0400)
Viewed: 121 times, last viewed: 2019-05-20 19:51:35 CDT (-0400)
Show Log