Polyporales » Polyporaceae » Haploporus

Haploporus odorus

Haploporus odorus (Sommerf.) Bondartsev & Singer 1944, in Cui, et al., Fungal Diversity 97, 137392 (2019)

Diagnosis: Basidiocarps perennial, sessile or effused-reflexed, single or imbricate, leathery, with a strong sweet odor when fresh, becoming hard corky and consistently with a sweet odor when dry. Pilei ungulate to semicircular, projecting up to 10 cm, 14 cm wide and 6 cm at base. Pileal surface cream when juvenile, becoming buff to cinnamon buff with age, glabrous, azonate; margin obtuse. Pore surface white to cream when fresh, becoming grayish white to pale buff when dry; pores round to angular, 34 per mm; dissepiments thick, entire. Context cream when fresh, pale buff when dry, corky, sometimes zonate, up to 3 cm thick. Tubes distinctly stratified, slightly paler than the pore surface, corky, up to 3 cm thickHyphal structure. Hyphal system dimitic; generative hyphae bearing clamp connections; skeletal hyphae weakly dextrinoid, CB+; tissues unchanged in KOH. Context. Generative hyphae infrequent, hyaline, thin-walled, frequently branched, 1.62.5 µm in diam; skeletal hyphae dominant, hyaline, thick-walled to subsolid, frequently branched, interwoven, 1.54.2 µm in diam. Generative hyphae hyaline, thin-walled, often branched, 1.52.4 µm in diam; skeletal hyphae dominant, thick-walled, with a narrow lumen, frequently branched, interwoven, 23.8 µm in diam. Cystidia and cystidioles absent. Basidia clavate or pear-shaped, with four sterigmata and a basal clamp connection, 2029 × 810 µm; basidioles similar in shape similar to basidia, but slightly smaller. Basidiospores ellipsoid, hyaline, thick-walled, ornamented with warts, IKI, CB+, (4.5–)56(–7) × (3.5–)3.95 (–5.5) µm, L = 5.68 µm, W = 4.23 µm, Q = 1.271.47 (n = 90/3).

Index Fungorum NumberIF286847

Notes: Haploporus odorus is characterized by perennial, pileate basidiocarps with distinct sweet odor. It may be confused with Fomes fomentarius in the field. However, the latter lacks sweet odor, and its basidiospores are smooth without warts.

Figure 1. A basidiocarp of Haploporus odorus



Figure 2. Microscopic structures of Haploporus odorus (drawn from Cui 6907). a. Basidiospores; b. Basidia and basidioles; c. Hyphae from trama. Bars: a = 5 µm; bc = 10 µm



Cui, B.K., & Li, H.J., & Ji, X., & Zhou, J.L., & Song, J. & Si, J., & Yang, Z.L., & Dai, Y.C. (2019). Species diversity, taxonomy and phylogeny of Polyporaceae (Basidiomycota) in China. Fungal Diversity 97, 137392


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.