Recent paper tackling the Xerocomus subtomentosus complex

Recent paper tackling the Xerocomus subtomentosus complex

I have recently received one new paper dealing with the complex around Xerocomus subtomentosus, a rather difficult group, which still poses several taxonomic problems despite of the recent research which much clarified the main species in this aggregate. The paper is written by the Italian mycologist Matteo Gelardi and appeared in Bolletino dell’Associazione Micologica ed Ecologica Romana.

The paper focuses on a new British collection of Xerocomus silwoodensis, an entity of recent creation, which variability is yet little known and its distribution poorly understood. Gelardi’s publication provides very detailed description of the new collection and suggests that X. silwoodensis might be under-recorded and is possibly more widespread than currently known. The macro characters and the microscopic features of the new collection are illustrated, together with the rest of the species in X. subtomentosus complex.

In addition Gelardi provides a comprehensive comparison of the four species in the compex and a dichotomic key for identification. What especially turns reader’s attention is that Gelardi recognizes several colour forms in this complex, namely X. ferrugineus f. citrinovirensX. subtomentosus f. luteolus and f. rubrotinctus, the first combination has never been validly published. I like this treatment as I have thought that such approach is necessary at least until more comprehensive knowledge is achieved on the variability in this group.

Below are the bibliographic details of the publication.
Gelardi, M. 2011. A noteworthy British collection of Xerocomus silwoodensis and a comparative overview on the European species of X. subtomentosus complex. – Bolletino dell’ Associazione Micologica ed Ecologica Romana 84: 28–38.