Xanthoconium sinense G. Wu, Y.Y. Cui & Zhu L.Yang, 2016

Liang, Zhi-Qun, Chai, Hui, Jiang, Shuai, Ye, Zheng-Kun & Zeng, Nian-Kai, 2017, The genus Xanthoconium (Boletaceae, Boletales) in tropical China, Phytotaxa 295 (3), pp. 246-254 : 250-252

publication ID	https://doi.org/ 10.11646/phytotaxa.295.3.5
persistent identifier	https://treatment.plazi.org/id/03AA87DE-763B-FFB5-FF29-F954FBB5FE4F
treatment provided by	Felipe
scientific name	Xanthoconium sinense G. Wu, Y.Y. Cui & Zhu L.Yang
status

Treatment

Xanthoconium sinense G. Wu, Y.Y. Cui & Zhu L.Yang View in CoL , Fungal Diversity 81: 167, 2016 ( Figs. 2e–i View FIGURE 2 and 4 View FIGURE 4 )

Description:— Basidiomata small to medium-sized. Pileus 3.5–7.5 cm in diameter, convex, then applanate; surface dry, nearly glabrous, sometimes rugulose, purplish brown when young, then brown; margin incurved; context 1–1.4 cm in thickness in the center of the pileus, white, unchanging in color when injured. Hymenophore poroid, adnate to slightly decurrent; pores angular to almost round, 0.5–2 mm in diameter, white when young, then yellow, unchanging in color when injured; tubes 5–9 mm in length, yellowish, unchanging in color when injured. Stipe 5–8.5 × 1–3 cm, central, subcylindric, solid, usually flexuous; surface dry, nearly glabrous, pale brown to brown, but base white, upper part sometimes with fine reticulations; context white, unchanging in color when injured; annulus absent; basal mycelium white. Odor indistinct.

Basidiospores [100/5/4] (8–)9–11(–12) × 3–4 μm, Q = 2.25–3.67(4.00), Q m = 2.94 ± 0.41, ellipsoid to subfusiform, slightly thick-walled (up to 0.5 μm), golden yellow, smooth. Basidia 22–31 × 7–8 μm, clavate, thin-walled, 4-spored,

colorless to hyaline in KOH; sterigmata 4–5 μm in length. Hymenophoral trama bilateral, composed of thin- to slightly thick-walled (up to 0.5 μm thick) hyphae, colorless in KOH, 4–8 μm wide. Cheilocystidia not observed. Pleurocystidia not observed. Pileipellis a trichoderm 50–80 μm thick, composed of more or less vertically arranged, moniliform or broadly subcylindrical, thin- to slightly thick-walled (up to 1 μm thick) hyphae, (4–)8–15 μm wide, colorless in KOH;

terminal cells 9–29 × 4–14 μm, subglobose or clavate, with obtuse apex. Pileal trama made up of hyphae 4–12 μm in diameter, thin- to slightly thick-walled (up to 1 μm thick), colorless in KOH. Stipitipellis a hymeniform layer composed of thin- to slightly thick-walled (up to 1 μm) emergent hyphae with narrowly or broadly clavate terminal cells (10–26 × 5–12 μm), colorless, sometimes yellowish brown in KOH, and occasionally with clavate, 4-spored basidia (18–23 × 5–6 μm). Stipe trama composed of longitudinally arranged, parallel, cylindrical, thin- to slightly thick-walled (up to 1 μm thick) hyphae 5–10 μm wide, hyaline to colorless in KOH. Clamp connections absent in all tissues.

Habitat: — Scattered on the ground in forests of Fagaceae .

Known distribution:—Southern China (Guangdong and Hainan Province).

Materials examined:— CHINA. Hainan Province: Ledong County, Jianfengling Nature Reserve , elev. 850 m, 3 July 2014, N. K. Zeng 1548, 1575 ( FHMU) ; same location, 4 July 2014, N. K. Zeng 1583 ( FHMU) ; Qiongzhong County, Yinggeling Nature Reserve , elev. 800 m, 12 October 2014, N. K. Zeng 1832 ( FHMU) .