Boletales » Boletaceae


Alessioporus Gelardi, Vizzini & Simonini, in Gelardi et al., Mycologia 106(6): 1171 (2014)


Etymology: Named in honour of the late Carlo Luciano Alessio, who first described the species and dedicated most of his mycological studies to the investigation of Italian boletes.

Diagnosis: Basidiomes pileate-stipitate with tubular-poroid hymenophore, epigeal, small to medium-small.

Pileus tomentose to glabrous, dry, with a wavy-lobed margin when young, ochraceous-brown, dark olive-brown to copper-brown with brownish-black fibrils. Hymenophore adnate to depressed around the stipe, bright yellow to olive-green. Stipe surface reticulate to coarsely ribbed or occasionally smooth, exhibiting a prominent narrow pseudo-annulus generally in the middle or lower part of the stipe, which is reminescent of the junction point of pileus and stipe resulting from a secondary angiocarpy (mixangiocarpy) at the very early developmental stage, rooting at the base; context whitish to yellowish but darker downwards; tissues quickly discoloring dark indigo blue when handled or injured; Taste mild; Spore print olive-brown.

Basidiospores smooth, ellipsoidal to ellipsoidal-fusoid. Cystidia cylindrical-fusiform to ventricose-fusiform or lageniform. Pileipellis a trichoderm of interwoven, filamentous hyphae; hymenophoral trama bilateral-divergent of the Boletus-typewith a lateral stipe stratum of the boletoid type”. Clamp connections absent; growing gregarious to more often caespitose or branched with up to twelve basidiomes arising from a common base and occasionally with secondary fruiting bodies emerging from the stipe of adjacent basidiomes.

Index Fungorum number: IF808529

Type species: Alessioporus ichnusanus (Alessio, Galli & Littini) Gelardi, Vizzini & Simonini 2014, in Gelardi et al., Mycologia 106(6): 1171 (2014)



Alessioporus ichnusanus (Alessio, Galli & Littini) Gelardi, Vizzini & Simonini 2014

Alessioporus rubriflavus J.L. Frank, A.R. Bessette & Bessette 2017


Key reference:

Gelardi, Matteo & Simonini, Giampaolo & Ercole, Enrico & Vizzini, Alfredo. (2014). Alessioporus and Pulchroboletus (Boletaceae, Boletineae), two novel genera for Xerocomus ichnusanus and X. roseoalbidus from the European Mediterranean basin: Molecular and morphological evidence. Mycologia. 106(6), 11681187. 10.3852/14-042.


About Basidiomycota

The webpage Basidiomycota provides an up-to-date classification and account of all genera of the phylum Basidiomycota.


Supported by 

Thailand Science Research and Innovation (TSRI)

project entitled:

"Macrofungi diversity research from the Lancang-Mekong Watershed and surrounding areas"

(Grant No. DBG6280009)


  • Email:
  • Addresses:
    Mushroom Research Foundation, 292 Moo 18, Bandu District,
    Muang Chiangrai 57100, Thailand
  • The State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.3 1st Beichen West Rd., Chaoyang District, Beijing 100101, P.R. China

Published by the State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences and
Mushroom Research Foundation
Copyright © The copyright belongs to the Curators. All Rights Reserved.