This pretty black Mollisia was growing on wet Tamarix wood, in fact at the magnifying glass I did not think at any time that it was a Mollisia. They are small cups of 1.5 2 mm in diameter.

The ectal excipulum has textura subglobulosa, becoming more prismatic towards the margin, where the terminal cells are cylindrical-claviform and very dark brown. The medullary excipulum has textura intricata. The asci are cylindrical, octosporic, biseriate, with croziers and IKI-. Paraphyses are cylindrical with a large VB occupying the entire terminal cell, with negative reaction to KOH. Ascospores are cylindrical-allantoid, without LBs, (6) 7 - 8 (8.3) × (1.6) 1.9 - 2.2 (2.4) µm; Q = (2.8) 3.3 - 4.1 (5); N = 56; Me = 7.4 × 2.1 µm ; Qe = 3.7,

With the keys I can't come up with anything coherent.

Thanks for your help.

Viktorie Halasu, 26-03-2025 20:57

Re : Black Mollisia 240325 on Tamarix

Why not M. ligni? It's frequent on Tamarix (and so far the only one I've found on this substrate).

Hans-Otto Baral, 26-03-2025 21:23

Re : Black Mollisia 240325 on Tamarix

Yes, definitely

Miguel Ángel Ribes, 26-03-2025 22:09

Re : Black Mollisia 240325 on Tamarix

Yes, I'm sure you're absolutely right, I hadn't got to this species because I was misled by the presence of the large BVs in the paraphyses.

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Hans-Otto Baral, 27-03-2025 07:21

Re : Black Mollisia 240325 on Tamarix

These VBs are typical, it is a Mollisia, though drought-tolerant.

Since you made such a detailed docu I could include your data in my paper on Haglundia (H. penyardensis is a synonym). For this I would need the collection data.

Miguel Ángel Ribes, 27-03-2025 22:04

Re : Black Mollisia 240325 on Tamarix

España, Madrid, Vicalvaro, Parque Forestal de Valdebernardo, 40.395022 -3.627373, 676 m, sobre ramas caídas de Tamarix sp., 23-03-2025, leg. J.C. Campos.

Hans-Otto Baral, 27-03-2025 22:38

Re : Black Mollisia 240325 on Tamarix

Thanks! You don't have scales for your first two section photos?