Observation 283814: Deconica xeroderma (Huijsman) Noordel.

Notes:
Growing in a pile of rotting straw in a Pinus strobus plantation. No annulus present. Caps slightly glabrous. Cheilocystidia hyaline. Pleurocystidia absent. Pileipellis a cutis. Spores smooth and subrhomboid in face view. Spore measurements from Piximetre: (5.4) 5.8 – 6.66 (6.7) × (3.9) 4.1 – 4.6 (5.1) µm, Q = (1.2) 1.3 – 1.5 (1.6) ; N = 30, Me = 6.1 × 4.4 µm ; Qe = 1.4
Individual spores: 6.09 × 4.03 µm, 6.08 × 5.08 µm, 6.24 × 4.29 µm, 6.03 × 4.06 µm, 6.66 × 4.36 µm, 6.68 × 4.63 µm, 6.68 × 4.22 µm, 6.53 × 4.40 µm, 5.97 × 3.93 µm, 5.89 × 4.35 µm, 6.43 × 4.32 µm, 5.79 × 4.39 µm, 6.23 × 4.30 µm, 6.33 × 4.44 µm, 6.19 × 4.52 µm, 6.67 × 4.61 µm, 6.04 × 4.24 µm, 5.89 × 4.74 µm, 6.51 × 4.78 µm, 6.03 × 4.63 µm, 5.96 × 4.52 µm, 5.45 × 4.15 µm, 6.36 × 4.44 µm, 5.88 × 4.31 µm, 5.66 × 4.30 µm, 5.89 × 3.99 µm, 6.15 × 4.43 µm, 5.64 × 4.37 µm, 6.14 × 4.52 µm, 5.94 × 4.06 µm
Cheilocystidia measurements from Piximetre: (6.7) 14.8 – 19.9 (20) × (4.4) 8.8 – 10.7 (11.1) µm, Q = (1.4) 1.5 – 2.1 (2.3) ; N = 10, Me = 16.6 × 9.6 µm ; Qe = 1.7
Individual cheilocystidia: 17.08 × 11.05 µm, 17.63 × 10.66 µm, 20.05 × 8.81 µm, 19.92 × 9.65 µm, 18.33 × 9.75 µm, 6.66 × 4.36 µm, 14.80 × 10.50 µm, 15.26 × 9.94 µm, 16.51 × 10.57 µm, 19.50 × 10.67 µm

Species Lists

Images

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Spores at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)
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Cheilocystidia at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)
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Cheilocystidia at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)
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Cheilocystidia at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)
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Cheilocystidia at 400x in distilled water
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Pileipellis at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)
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Terminal elements of pileipellis at cap margin at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)
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Basidia at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)
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Gill face showing basidia at 400x in NH4OH (2 drops), phloxine (1 drop) and congo red (1 drop)

Proposed Names

57% (1)
Eye3 Eyes3
Used references: Guzmán, G. (1983). The genus Psilocybe: a systematic revision of the known species including the history, distribution and chemistry of the hallucinogenic species (No. 74). J. Cramer.
Guzmán, G. (1995). Supplement to the monograph of the genus Psilocybe. Taxonomic monographs of Agaricales. Bibliotheca Mycologica, 159, 91-141.
Singer, R. (1989). New taxa and new combinations of Agaricales (Diagnoses fungorum novorum Agaricalium IV). Fieldiana: Botany New Series, 21, 1-133.
https://web.archive.org/...
Based on microscopic features: Hyaline cheilocystidia, no pleurocystidia, spores subrhomboid in face view, spore size, width of cheilocystidia

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks Pulk!
By: Django Grootmyers (heelsplitter)
2018-01-14 07:47:31 CST (+0800)

I just got some literature on Chinese Deconica that may be relevant. I’ll check to see if any of those species concepts apply to this better than D. xeroderma.

Great observation!
By: Jacob Kalichman (Pulk)
2018-01-14 04:39:43 CST (+0800)
Deconica xeroderma
By: Django Grootmyers (heelsplitter)
2018-01-13 09:55:59 CST (+0800)

Deconica xeroderma seems like a pretty good match but the cheilocystidia are consistently shorter. It could either be that this is an atypical collection of D. xeroderma or a similar unnamed species. I’ll try to get this one sequenced.

Created: 2017-07-26 19:28:11 CST (+0800)
Last modified: 2018-01-14 07:47:32 CST (+0800)
Viewed: 67 times, last viewed: 2018-04-13 11:28:11 CST (+0800)
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