Pleurotus tuber-regium (Fr.) Singer, Lilloa

Karunarathna, Samantha C., Mortimer, Peter E., Chen, Jie, Li, Guo-Jie, He, Mao-Qiang, Xu, Jianchu, Seelan, Jaya Seelan Sathiya, Hassan, Bahkali Ali, Hyde, Kevin D. & Zhao, Rui-Lin, 2016, Correct names of two cultivated mushrooms from the genus Pleurotus in China, Phytotaxa 260 (1), pp. 36-46 : 41-43

Pleurotus tuber-regium (Fr.) Singer, Lilloa 22: 271 (1951) [1949] Fig. 3

≡ Agaricus tuber-regium Fr., Syst. mycol. (Lundae) 1: 174 (1821)

≡ Lentinus tuber-regium (Fr.) Fr., Syn. generis Lentinus : 3 (1836)

≡ Pachyma tuber-regium Fr., Syst. mycol. (Lundae) 2(1): 243 (1822)

≡ Panus tuber-regium (Fr.) Corner, Beih. Nova Hedwigia 69: 98 (1981)

≡ Pocillaria tuber-regium (Fr.) Kuntze, Revis. gen. pl. (Leipzig) 2: 866 (1891)

= Lentinus cameroensis Cooke & Massee , in Cooke, Grevillea 16(no. 77): 15 (1887)

= Lentinus cyathus Berk. & Broome, Trans. Linn. Soc. London, Bot., Ser. 2 1(6): 399 (1880) [1879] = Lentinus descendens Afzel. ex Fr., Fung. Guin. : 8 (1837)

= Lentinus dybowskii Pat., Bull. Soc. mycol. Fr. 11: 85 (1895)

= Lentinus flavidus Massee, Bull. Misc. Inf., Kew : 163 (1901)

= Lentinus kaernbachii Henn., Syll. fung. (Abellini) 9: 72 (1891)

= Lentinus pachymae Fr., Syst. orb. veg. (Lundae) 1: 77 (1825)

= Lentinus scleroticola G. Murray, Trans. Linn. Soc. London, Bot., Ser. 2 2: 229 (1886)

= Lentinus stenophyllus Berk., London J. Bot. 6: 495 (1847)

= Lentinus taylorii G. Murray, Trans. Linn. Soc. London, Bot., Ser. 2 2: 232 (1886)

= Pocillaria cyathus (Berk. & Broome) Kuntze, Revis. gen. pl. (Leipzig) 2: 866 (1891)

= Pocillaria descendens (Afzel. ex Fr.) Kuntze, Revis. gen. pl. (Leipzig) 2: 866 (1891)

= Pocillaria stenophylla (Berk.) Kuntze, Revis. gen. pl. (Leipzig) 2: 866 (1891)

Specimen examined:— China, Jiangxi Province, Fuzhou City , 6 February 2015 ; from JingShan mushroom growing company; Jinshan Fang (ZRL-2015304, HMAS: 253940) ; CHINA, Yunnan Province, Xishuangbanna, Mengsong Village ; UTM-N2379744.485281, UTM-E653217.753714; alt. 1600m; 8 July 2013; on rotting wood; Samantha C. Karunarathna ( MFLU 14-0743 ) .

Pilei 2.5–19 cm wide, deeply infundibuliform, brownish fuliginous and minutely scurfy squamulose, then pale and minutely, but interruptedly white from the centre outwards, not scaly; margin incurved on maturing, strongly on drying, with small floccose fragments of the veil. Stipe 30–90 x 4–19 mm, central, subcylindric, concolorous and minutely scurfy squamulose as the pileus. Veil minute, attaching to the apex of the stem, to the very young pileus greyish subfloccose, soon rupturing and disappearing. Lamellae deeply decurrent, very crowded, thin, narrow, 0.3–0.8 mm wide, mostly dichotomous, cream-white to subochraceous, with entire fuscous-grey edge, very sinuous on drying; no hyphal pegs. Context 2–4 mm thick in the centre of the pileus, at first cheesy and hard, then coriaceous, white. Smell mushroomy.

Basidiospores 7–10 × 3–4.5 Μm, white, smooth, subcylindric, inamyloid and thin walled. Basidia 22–37 × 5–7 Μm; 4 sterigmata. Cheilocystidia 22–48 × 4.5–7.5 Μm, subcylindric, subclavate, subventricose, projecting, thin-walled, smooth, as a sterile edge. Pleurocystidia and hyphal pegs absent. Hyphae dimitic with skeletal and generative hyphae. Generative hyphae 2–8 Μm, not inflating, with a slightly thickened wall, frequently branching with prominent clamp connections. Skeletal hyphae 2–7 Μm, hyaline or pale stamineous, with a thickened wall, rarely branched, and a narrow but distinct lumen. Gill-trama with radiate construction. Fruiting bodies are formed from tuber like, uneven, oblong, dark brown with white context, 12–15 cm diameter sclerotia within rotten wood.

Habitat and distribution:—on buried rotten wood in rain forest, solitary. Widely distributed in Australia, Chad Republic ( Pegler 1983), China (this study) Ghana, India, Ivory Coast, Kenya, Liberia, Madagascar ( Pegler 1983), Malaysia (this study), Middle Congo, Nigeria, Papua New Guinea, Samoa, Sierra Leone, Solomon Islands, Sri Lanka, Tanzania ( Pegler 1983), Thailand ( Karunarathna et al. 2011a, b); Uganda, Zaire Republic, Zambia, Zanzibar, and Zimbabwe ( Pegler 1983).

Figures

FIGURE 3. Pleurotus tuber-regium (ZRL 2015304/ MFLU 14-0743) A. Basidia and a basidiole; B. Basidiospores; C. Cheilocystidia; D. Skeletal hyphae E. Generative hyphae; F. Fruiting bodies of ZRL 2015304, G. Fruiting bodies of MFLU14-0743 Scalebars:A, C = 20 Μm; B = 10 Μm; D, E = 10 Μm