Fulvifomes dracaenicola Z.B. Liu & Y.C. Dai, 2021

Du, Ping, Cao, Tian-Xu, Wu, Ying-Da, Zhou, Meng & Liu, Zhan-Bo, 2021, Two new species of Hymenochaetaceae on Dracaena cambodiana from tropical China, MycoKeys 80, pp. 1-17 : 1

Fulvifomes dracaenicola Z.B. Liu & Y.C. Dai sp. nov. Figs 3 , 4

Diagnosis.

Fulvifomes dracaenicola is characterised by perennial, pileate, triquetrous basidioma with yellowish brown fresh pores which becoming honey yellow with silk sheening upon drying, a dimitic hyphal system in trama and monomitic in context, subglobose basidiospores measuring 4.8-5 × 4-4.1 μm.

Holotype.

China. Hainan Province, Sanya, Daxiaodongtian Park, N18.299, E109.172, on living tree of Dracaena cambodiana , 15.XI.2020, Dai 22097 (BJFC 035989).

Etymology.

Dracaenicola (Lat.): referring to the species growing on Dracaena cambodiana .

Fruiting body.

Basidioma perennial, pileate, without odor or taste and woody hard when fresh, light in weight when dry. Pilei triquetrous, projecting up to 2.5 cm, 2.3 cm wide and 2.6 cm thick at base. Pileal surface yellowish brown to grayish brown when fresh, vinaceous brown when dry, encrusted, glabrous, zonate, uncracked, margin olivaceous brown. Pore surface yellowish brown when fresh, honey yellow with silk sheening when dry; sterile margin indistinct; pores circular, 5-7 per mm; dissepiments thin, entire. Context cinnamon buff to fawn, corky, often darker near the pileus surface, up to 1.4 cm thick, with a distinct crust (black line) near pileus surface at the basal area, partly with additional crust (black line) within context or above tubes. Tubes cinnamon buff to cinnamon, woody hard, up to 1.2 cm thick, tube layers distinctly stratified, individual tube layer up to 0.5 cm long.

Hyphal structure.

Hyphal system dimitic in trama, monomitic in context; generative hyphae simple septate; tissues darkening but otherwise unchanged in KOH.

Context.

Generative hyphae apricot-orange to brownish-orange, thick-walled with a wide lumen, simple septate, unbranched, regularly arranged, 4.5-6 µm in diam.

Trama of the tubes.

Generative hyphae hyaline, thick-walled, simple septate, occasionally branched, 2-2.5 mm in diam; skeletal hyphae apricot-orange to brownish-orange, thick-walled to subsolid, unbranched, loosely interwoven, 3.5-4 mm in diam. Setae or setal hyphae absent; hymenium collapsed in the studied material, basidia and basidioles not seen.

Spores.

Basidiospores subglobose with an apiculus, yellowish brown, thick-walled, smooth, IKI-, CB-, occasionally collapsed when mature, 4.8-5(-5.5) × 4-4.1 μm, L = 5.02 μm, W = 4.04 μm, Q = 1.22-1.25 (n = 90/3).

Additional specimens (paratypes) examined.

China. Hainan Province, Sanya, Daxiaodongtian Park, N18.299, E109.172, on rotten wood of living Dracaena cambodiana , 15.XI.2020, Dai 22093 (BJFC 035986), Dai 22095 (BJFC 035987).

Figures

Figure 3. A basidiocarp of Fulvifomes dracaenicola (Holotype, Dai 22097). Scale bar: 1.0 cm. Photo by: Yu-Cheng Dai.

Figure 4. Microscopic structures of Fulvifomes dracaenicola (Holotype, Dai 22097) a basidiospores b hyphae of context c hyphae of the tubes. Drawings by: Meng Zhou.