Pleurotus djamor (Rumph. ex Fr.) Boedijn

Zeng, Long, Xu, Yi-Hua, Wan, Le-Le, Sun, Yi-Fei & Cui, Bao-Kai, 2025, Taxonomy and phylogeny of the Pleurotus djamor complex with descriptions of a new species from China, MycoKeys 126, pp. 119-133 : 119-133

Pleurotus djamor (Rumph. ex Fr.) Boedijn , Rumphius Mem. Vol. 292, 1959.

Figs 5 , 6

Diagnosis.

Pleurotus djamor is characterized by a pileus that is clay-pink to salmon or white when young, becoming thicker and turning brown at maturity.

Description.

Pileus 20–70 × 20–100 mm, flabelliform, clay-buff to salmon (6 B / C 4–6 A 4) or white when young, brown at maturity; surface dry, glabrous; margin entire. Lamellae decurrent, margin entire, l – 7.5 mm in dry state, white when young becoming pinkish buff (5 A 3) when old. Stipe 5–10 mm long, 4–8 mm in diam., laterally stipitate or sessile. Context 1–3 mm thick when dry.

Basidiospores (6.8 –) 7.0–9.5 (– 10.6) × (2.8 –) 3.1–4.2 (– 4.4) μm, L = 8.0 μm, W = 3.54 μm, Q = 2.24–2.28 (n = 60 / 2), cylindrical-oblong, hyaline, thin-walled, smooth, IKI –, CB –. Basidia 27.1–31.8 × 5.2–7.3 μm, clavate, 4 – spored, hyaline, thin-walled. Basidioles 23.1–27.7 × 5.8–6.6 μm, in shape similar to basidia. Cheilocystidia hyaline, thin-walled, clavate with mucronate, 27.9–32.3 × 6.3–7.9 μm. Pleurocystidia absent. Hymenophoral trama dimitic, with clamped generative hyphae 3.7–8.7 μm in diam, and skeletal hyphae 2.9–5.8 μm in diam. Pileus trama dimitic, with generative hyphae 4.0–8.5 μm in diam, and skeletal hyphae 3.1–5.2 μm in diam. Stem context dimitic, with generative hyphae 3.4–6.8 μm in diam, and skeletal hyphae 2.6–4.2 μm in diam.

Habitat and distribution.

Solitary, gregarious to imbricate, on angiosperm trees in the tropical forests of Southeast Asia and the Americas.

Specimens examined in this study.

Puerto Rico • San Juan, 15 July 2018, Cui 16855 ( BJFC) ; • Rio Abajo State Forest Park , 16 July 2018, Cui 16861 ( BJFC) & Cui 16862 ( BJFC) ; • Carite State Forest Park , 19 July 2018, Cui 16890 ( BJFC) & Cui 16902 ( BJFC) & Cui 16920 ( BJFC) & Cui 16922 ( BJFC) & Cui 16925 ( BJFC) .

Figures

Figure 5. Basidiomata of Pleurotus djamor in the field. A. (Cui 16861); B. (Cui 16862); C. (Cui 16902); D. (Cui 16890). Scale bars: 1 cm.

Figure 6. Microscopic structures of Pleurotus djamor (Cui 16861). A. Basidiospores; B. Hyphae of the hymenium; C. Basidia and basidioles; D. Lamella section; E, F. Cheilocystidia. Scale bars: 10 µm (A – F).