taxonID	type	description	language	source
03FD8783FFFE3A7BE0E2C8B6FCCB6CAA.taxon	materials_examined	Holotype: — CHINA. Hainan Province: Wuzhishan City, Nansheng Town, Wuzhishan substation of Hainan Tropical Rain Forest National Park, on clay soil under Carpinus L. (1753: 998) forests, at 109 ° 40 ′ 43 ′′ E, 18 ° 51 ′ 53 ′′ N, 688 m asl., 30 July 2021, leg. W. J. Yu, P. M. He & Y. G. Fan, FYG 6307 (FCAS 3513); GenBank accession numbers: OP 207874 - ITS, OP 207868 - LSU, OP 227086 - rpb 2. Diagnosis: — This new species can be distinguished from other taxa in the genus Inocybe by brown, smooth- to striped-fibrillose, acutely umbonate, and small-sized pileus; subdistant lamellae with 10 – 13 attached to the stipe; slender stipes; nodulose to sub-stellate, 7.0 – 10.0 × 5.5 – 7.5 μm size basidiospores; sub-fusiform, utriform to clavate pleurocystidia mostly <50 μm in length; the absence of caulocystidia and oily hyphae, and association with Carpinus trees. Etymology: — referring to its putative host plant, Carpinus londoniana var. lanceolata (Hand. - Mazz.) P. C. Li. (1979: 68). Description: — Basidiomata small - sized, and slender. Pileus 3 – 12 (17) mm, conical when very young, conicalcampanulate to convex or applanate with a small pointed umbo, occasionally not umbonate but with depression towards the disc when mature; margin slightly incurved, then straight upon maturity; surface dry, smooth-fibrillose to striped-fibrillose, covered with grayish-white (1 B 2) appressed velipellis in young specimens around the center, more sparsely so outwards, fugacious; initially dark brown (6 E 6 – 6 E 7), then yellowish brown (5 C 6) or brownish yellow (5 C 8), sometimes darker towards the margin (6 E 8). Cortina present at both pileus margin and upper part of stipe in young specimens, fugacious. Lamellae adnexed, sub-distant, 1 – 1.5 (2) mm in width, unequal with 10 – 13 attached to the stipe, alternately distributed with 3 – 4 tiers of lamellulae, edge indistinctly fimbricate, nearly concolorous with the face; white to ivory white (1 A 1 – 1 B 1) at first, then beige (1 B 2 – 1 B 3) to brownish (4 B 8), brown (5 B 7 – 5 C 8) to dark brown (6 C 7 – 6 D 8) when mature. Stipe 15 – 40 mm long, 0.8 – 1.5 mm wide, terete, solid, equal with a slightly swollen base, pruinose at the extreme apex, covered with a heavy partial veil and a dense appressed whitish vesture downwards, background pale yellowish (5 B 5 – 5 B 6) when young, brownish (5 B 7) at maturity. Context fleshy, white (1 A 1) to beige (1 B 2 – 1 B 3) with a brownish tinge (5 C 8) in pileus, 0.2 – 0.4 mm thick at mid-radius, 1 – 1.3 mm under the umbo; fibrillose in stipe, brownish (5 B 5), striate, shiny. Odour indistinct. Basidiospores [100 / 4 / 2] (7.0) 7.5 – 8.4 – 9.2 (10.0) × (5.5) 5.8 – 6.3 – 7.0 (7.5) μm, Q ＝ (1.07) 1.10 – 1.32 – 1.50 (1.61), Q m ± SD ＝ 1.32 ± 0.0107; nodulose to sub-stellate, with 7 – 9 prominent nodules, apiculus small and indistinct, yellowish to goldish in 5 % KOH, with one intracellular ellipsoid oily content. Basidia 20 – 28 × 7 – 11 μm, slenderly clavate to clavate, occasionally broadly clavate, obtuse at apex, tapered downwards, some with oily contents of different sizes, with 4 - or 2 - sterigmata 3 – 5 mm length, colorless or yellowish. Pleurocystidia 41 – 52 × 11 – 20 μm, sub-fusiform, utriform to broadly clavate, apices rounded or obtuse, often with crystals, base tapered into pedicel or occasionally truncate, slightly thick-walled, walls yellowish, 0.5 – 1 μm thick; colorless but with yellowish contents. Cheilocystidia 33 – 50 × 12 – 19 μm, resemble pleurocystidia, clavate or fusiform, walls yellowish, up to 1 μm thick. Hymenophoral trama 50 – 77 μm thick, sub-regularly arranged, yellowish in mass, composed of cylindrical or inflated hyphae measured 3 – 9 μm or 11 – 25 μm wide, respectively, smooth, colorless to yellowish, thin-walled. Pileipellis a cutis, 30 – 52 μm thick, brownish in mass, composed of cylindrical to inflated hyphae 4 – 20 in width, incrusted, thin-walled, walls yellowish. Pileal trama colorless or yellowish, sub-regular, hyphae inflated, colorless, 13 – 19 μm wide. Stipitipellis a cutis, regular, hyphae thin-walled, incrusted, and yellowish to yellow. Stipe trama regularly arranged, composed of colorless to yellowish, thin-walled, incrusted hyphae 4 – 15 μm wide. Caulocystida, cauloparacystidia, and oily hyphae not observed. Clamp connections present in all tissues. Habitat and ecology: — Scattered on clay soil under Carpinus londoniana var. lanceolata. Fruits in July to August in tropical China. Distribution: — Known only from the type locality, Hainan Province of China. Additional specimens examined: — CHINA. Hainan Province: Wuzhishan City, Nansheng Town, Wuzhishan substation of Hainan Tropical Rain Forest National Park, on clay soil under Carpinus forests, at 109 ° 40 ′ 43 ′′ E, 18 ° 51 ′ 53 ′′ N, 690 m asl., 29 July 2021, leg. Y. - G. Fan, L. - S. Deng, L. - N. Zhao, J. - H. Hu, FYG 6297 (FCAS 3617), FYG 6300 (FCAS 3618), 30 August 2021, leg. W. - J. Yu, P. - M. He, Y. - G. Fan, FYG 6312 (FCAS 3620), FYG 6315 (FCAS 3621), W. - J. Yu & Y. - G. Fan, FYG 6381 (FCAS 3622).	en	He, Pan-Min, Fan, Yu-Guang, Deng, Lun-Sha, Yu, Wen-Jie (2022): Inocybe carpinicola (Inocybaceae, Agaricales), a new nodulose-spored species from Hainan Province, China. Phytotaxa 575 (1): 79-88, DOI: 10.11646/phytotaxa.575.1.5, URL: http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN
