Polyporales » Polyporaceae » Haploporus

Haploporus odorus

Haploporus odorus (Sommerf.) Bondartsev & Singer 1944, in Cui, et al., Fungal Diversity 97, 137–392 (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, 3–4 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 thick.  Hyphal 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, 1.6–2.5 µm in diam; skeletal hyphae dominant, hyaline, thick-walled to subsolid, frequently branched, interwoven, 1.5–4.2 µm in diam. Generative hyphae hyaline, thin-walled, often branched, 1.5–2.4 µm in diam; skeletal hyphae dominant, thick-walled, with a narrow lumen, frequently branched, interwoven, 2–3.8 µm in diam. Cystidia and cystidioles absent. Basidia clavate or pear-shaped, with four sterigmata and a basal clamp connection, 20–29 × 8–10 µm; basidioles similar in shape similar to basidia, but slightly smaller. Basidiospores ellipsoid, hyaline, thick-walled, ornamented with warts, IKI–, CB+, (4.5–)5–6(–7) × (3.5–)3.9–5 (–5.5) µm, L = 5.68 µm, W = 4.23 µm, Q = 1.27–1.47 (n = 90/3).

Index Fungorum Number:  IF286847

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; b–c = 10 µm

 

Reference:

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, 137–392

 

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