Hohenbuehelia portegna (Speg.) Singer

Khalid, Muhammdah, Razzaq, Fauzia, Ashraf, Urooj, Afshaan, Najam-ul-Sehar & Khalid, Abdul Nasir, 2024, Three new records of genus Hohenbuehelia (Pleurotaceae, Agaricales) in Pakistan, Italian Botanist 18, pp. 179-191 : 179-191

Hohenbuehelia portegna (Speg.) Singer , Lilloa 22: 256 (1951) [1949]

Fig. 4

Description.

Basidiomata small, pleurotoid, soft. Pileus laterally attached, 1–2 cm wide, convex from aside, highly striate, brown (10 YR 7 / 6) when young, brownish yellow (10 YR 6 / 6) when mature, shiny, margins incurved. Lamellae very crowded, narrow, adnate, white to creamy white, entire margins. Stipe strongly reduced and lateral, present up to 1–3 mm pseudo – stipe appears when young, disappearing at maturity. Odour and Taste not recorded.

Basidiospores (8.0 –) 8.10–9.80 (– 9.90) × (4.01 –) 4.33–5.88 (– 5.92) μm, Q = 1.2–2.0, Qav = 1.6, ellipsoid, thin-walled, appearing smooth, hyaline, no germ pore, apiculate. Basidia clavate, hyaline, (23.0 –) 23.3–40.80 (– 41.90) × (4.01 –) 4.2–4.5 (– 4.7) μm, sterigmata 2, 3–4 μm long, clavate. Cheilocystidia (16.50 –) 16.80–20.90 (– 21.45) × (4.15 –) 4.30–6.95 (– 7.01) µm, avl × avw = 17.40 × 6.68 µm, lecythiform, capitate apex, thin to slightly thick-walled, hyaline in 5 % KOH. Pleurocystidia (34.80 –) 36.10–79.85 (– 82.05) × (9.0 –) 9.65–17.95 (– 19.60) µm, avl × avw = 59.90 × 13.63 µm, metuloid, fusiform, lanceolate, apex covered with a layer of crystals, very abundant, brownish in 5 % KOH. Hymenophoral trama regular, made up of narrow, cylindrical, 3–6 μm wide hyphae. Lamella edge fertile, cystidia absent. Pileipellis an entangled trichoderm of semi-erect cylindrical, cutis, 2.0–4.0 μm wide. Clamp-connections abundant.

Habit and habitat.

Gregarious on a decaying wooden door.

Specimen examined.

Pakistan. Punjab, Lahore District, Quid e Azam Campus, University of the Punjab , 31°30'0.20"N, 74°18'32.27"E at 217 m. a. s. l., University of the Punjab, Quaid e Azam Campus, Spring, 13 July 2023, Abdul Nasir Khalid & Muhammadah Khalid, (MMK- 02: GenBank PP 594061, LAH 38209 ) .

Figures

Figure 4. Micro-morphological features of Hohenbuehelia portegna (MMK- 02): A, B basidiomata C cheilocystidia (cap pointed by arrow) D – F basidiospores G basidia (sterigmata pointed by the arrow) H, I pleurocystidia (cap pointed by arrow) J hymenophoral hyphae (arrow showing clamp connections), Pileipellis with clamp connections (arrow pointed). Scale bars: 1 cm (A); 0.5 cm (B); 5 μm (C); 5 μm (D – F); 10 μm (G); 10 μm (H – J).