Hymenochaetales » Hymenochaetaceae » Porodaedalea

Porodaedalea pini

Porodaedalea pini (Brot.) Murrill 1905, in Dai, Y.C., Fungal diversity, 45, 131-343 (2010)

Basionym: Boletus pini Brot., Flora Lusitanica 2: 468 (1804)

Diagnosis: Fruitbody Basidiocarps perennial, pileate, without odor or taste and hard corky when fresh, heavy and woody hard when dry. Pilei usually ungulate, projecting up to 7 cm, 12 cm wide and 4 cm thick at base. Pileal surface greyish to black, concentrically sulcate with narrow zones, irregularly cracked and become encrusted with age; actively growing context duplex, lower dense part separated from the upper trichoderm by a thin black line; margin obtuse or acute, hispid, dark brown. Pore surface rust-brown to umber brown, slightly glancing; sterile margin narrow to almost lacking; pores circular to more or less daedaleoid, 23 per mm; dissepiments thin, entire. Context dull brown, woody hard, distinctly thinner than tube layer, up to 5 mm thick. Tubes varying from yellowish brown of young stage to pale umber-brown of old parts, woody corky, up to 3.5 cm long, annual layers indistinct, old tubes merging into context. Hyphal structure Hyphal system dimitic; generative hyphae simple septate; tissue darkening but otherwise unchanged in KOH. Context Generative hyphae hyaline, thin-walled, occasionally branched, frequently simple septate, 23.2 μm in diam; skeletal hyphae dominant, yellowish brown, thick-walled with a wide lumen, rarely branched, occasionally septate, loosely interwoven to regularly arranged, 24 μm in diam; hyphae of trichoderm fairly thick- to thick-walled with a wide lumen, unbranched, frequently septate, straight, regularly arranged, 34.5 μm in diam; hyphae of crust distinctly thick-walled with a narrow lumen to subsolid, agglutinated, 34.5 μm in diam. Tubes Generative hyphae infrequent, hyaline, thin-walled, occasionally branched, frequently septate, 1.83 μm in diam; skeletal hyphae yellowish brown, thick-walled with a narrow to wide lumen, unbranched, frequently septate, straight, parallel along the tubes, 2.33.8 μm in diam. Setae frequent, originating from both subhymenial and tramal hyphae, not seen at dissepiment edges, not or rarely embedded in trama, subulate, dark brown, thick-walled, 3060×712 μm; cystidioles infrequent, clavate, hyaline, thin-walled; basidia distinctly clavate, with four sterigmata and a simple septum at the base, 1221×46 μm; basidioles dominating in hymenium, in shape similar to basidia, but shorter than basidia. Spores Basidiospores broadly ellipsoid, hyaline, thin to slightly thick-walled, smooth, bearing no guttule, usually glued in tetrads, IKI, moderately CB+, (3.8–)4.15.2(–5.6)×(3–)3.24.3(–4.8) μm, L=4.63 μm, W=3.78 μm, Q=1.181.26 (n=90/3).

Index Fungorum Number: IF431973

Figure 1. Basidiocarps of Porodaedalea pini

Figure 2Microscopic structures of Porodaedalea pini. a basidiospores;b setae; c hyphae from upper tomentum; d skeletal hyphae from context; e skeletal hyphae from trama



Dai, Y.C. (2010). Hymenochaetaceae (Basidiomycota) in China. Fungal diversity, 45, 131-343.


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: basidio.org@yahoo.com
  • 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.