taxonID	type	description	language	source
039472014564FF8677C09C3C9888FE98.taxon	etymology	Etymology: — The specific epithet refers to its greyish-white pileus color. Diagnosis: — Differs from V. sathei by its shiny greyish-white umbonate pileus, subglobose to broadly ellipsoid basidiospores, utriform cheilocystidia and a white to brown volva. Holotype: — Pakistan, Punjab, Mianwali District, Jinnah Barrage, at 210 m a. s. l., on soil, 17 July 2023, Mehboobullah Khan, 25 - S 32 (UEHF 0010); GenBank accession: OR 886619 (ITS) and OR 886620 (LSU). Description: — Pileus 4.5 – 6.3 cm in diameter, convex to applanate at maturity, slightly umbonate, center light pink (5 RP 9 / 3); surface delicately fibrillose; margin plicate striate; light pink (5 RP 9 / 3) from center to white towards the margins; context shiny greyish-white. Lamellae free, close; margin entire; pink (5 RP 8 / 4). Lamellulae frequent, of variable lengths. Stipe 7 – 9.2 × 0.8 – 1 cm, central, slightly broad from apex (1.2 cm) and base (1 – 1.5 cm); surface fibrillose; shiny white. Volva 3.2 – 3.5 × 2.3 – 2.9 cm; saccate, irregularly lobed; white to brown (10 YR 9 / 4) from outside, inner side light pink (5 RP 9 / 3). Basidiospores [40 / 2 / 2] (5.2) 5.7 – 7.2 (7.4) × (4.6) 5.2 – 6.5 (7.1) µm, Q = 1 – 1.3, avQ = 1.2, subglobose to broadly ellipsoid, apiculus prominent, thick walled, guttulate, hyaline to greenish in 5 % KOH. Basidia (21.5) 23.5 – 31.4 (34) × (10) 10.1 – 12.8 (13) µm, clavate to rarely fusiform, 2 – 4 spored. Cheilocystidia (51.5) 51.8 – 62 (63.5) × (18.5) 19.5 – 24.4 (25) µm, abundant, variable shapes, clavate to broadly fusiform, narrowly utriform with basal cells, triangular to conical. Pleurocystidia (20) 23.7 – 26.9 (28.8) × (8.6) 9.5 – 11 (12.5) µm, extremely variable in size and shape, broadly clavate to utriform, mucronate to fusiform, septa at base. Pileipellis (9.5) 9.7 – 11.8 (11.9) µm wide, cutis type, terminal cell broad (15.8 – 16 µm), cylindrical, intricate or irregular trichoderm, branched, septate. Stipitipellis (5.5) 7.5 – 9.9 (11.3) µm wide, intricate trichoderm, septate. Clamp connections absent in all tissues and hyaline in 5 % KOH. Habitat and distribution: — On soil, xerophytic vegetation of Mianwali District, Punjab, Pakistan. Additional material examined: — Pakistan, Punjab, Lahore District, Lahore, Botanical Garden, University of the Punjab, at 217 m a. s. l., solitary on soil, 25 July 2022, Aneeqa Ghafoor, Eisha Komal and Abdul Rehman Niazi, BG- 1 (LAH 25722!); GenBank accession: OR 146496 (ITS).	en	Arshad, Wasiqa, Ijaz, Hira, Khan, Mehboobullah, Yasmeen, Aneela, Zhao, Chang-Lin, Ghafoor, Aneeqa, Komal, Eisha, Niazi, Abdul Rahman, Jabeen, Sana (2024): Volvariella griseoalba (Agaricales, Volvariellaceae), a new species from Punjab, Pakistan. Phytotaxa 661 (1): 31-46, DOI: 10.11646/phytotaxa.661.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.661.1.2
