Chalciporus radiatus Ming Zhang & T.H. Li, Mycoscience 57: 21, 2016

Chai, Hui, Liang, Zhi-Qun, Xue, Rou, Jiang, Shuai, Luo, Shi-Hong, Wang, Yong, Wu, Lu-Ling, Tang, Li-Ping, Chen, Yun, Hong, Deng & Zeng, Nian-Kai, 2019, New and noteworthy boletes from subtropical and tropical China, MycoKeys 46, pp. 55-96 : 65-67

4. Chalciporus radiatus Ming Zhang & T.H. Li, Mycoscience 57: 21, 2016 Figures 4k, l, 10

Description.

Basidiomata small. Pileus 2.5-5 cm in diameter, subhemispherical to convex when young, then applanate; surface dry, pale yellowish brown, densely cov ered with pale yellowish-brown, yellowish-brown, brown to reddish-brown squamules; margin decurved; context 0.6-1 cm thick in the center of the pileus, yellowish, unchanging in color when injured. Hymenophore poroid, slightly decurrent; pores radially strongly elongated, yellow to pale yellowish brown, reddish with age, unchanging in color when injured; tubes 0.2-0.4 cm in length, yellowish, unchanging in color when injured. Stipe 2.5-4.5 × 0.5-1 cm, central, subcylindric, solid; surface dry, yellow, covered with yellowish brown, brown to reddish-brown squamules; context yellowish, unchanging in color when injured; annulus absent; basal mycelium yellow. Odor indistinct.

Basidia 23-34 × 7-10 μm, clavate, thin-walled, four-spored; sterigmata 5-6 μm in length. Basidiospores [101/5/4] 6 –7(– 8) × 3-4 μm, Q = (1.63 –)1.71–2.14(– 2.33), Qm = 1.91 ± 0.15, subfusoid and inequilateral in side view with a weak or distinct suprahilar depression, elliptic-fusiform to subfusiform in ventral view, slightly thick-walled (to 0.5 μm), olive-brown to yellowish brown in KOH, smooth. Hymenophoral trama boletoid. Cheilocystidia 57-75 × 8-10 μm, abundant, subfusiform or fusiform, thin-walled, with pale yellowish-brown to yellowish-brown contents, without encrustations. Pleurocystidia 60-76 × 7-9 μm, abundant, fusiform or subfusiform, thin-walled, with pale yellowish-brown to yellowish-brown contents, without encrustations. Pileipellis a trichoderm 200-230 μm thick, composed of rather vertically arranged, sometimes slightly interwoven, pale yellowish-brown to yellowish-brown in KOH, thin-walled hyphae 4-10 μm in diameter; terminal cells 25-50 × 6-9 μm, narrowly clavate or subcylindrical, with obtuse apex. Pileal trama composed of thin- to slightly thick-walled (up to 0.5μm) hyphae 2-8 μm in diameter. Stipitipellis hymeniform composed of thin- walled hyphae with clavate, subclavate, subfusiform or fusiform terminal cells (13-80 × 5-9 μm). Stipe trama composed of cylindrical, thin- to slightly thick-walled (to 0.5 μm) parallel hyphae 5-11 μm in diameter. Clamp connections absent in all tissues.

Habitat.

Solitary, scattered or gregarious on the ground in forests of Pinus massoniana Lamb. or P. latteri Mason.

Distribution.

Central ( Zhang et al. 2015), southeastern, and southern China.

Specimens examined.

CHINA. Fujian Province: Zhangping County, Xinqiao Town, Chengkou Village, elev. 370 m, 4 August 2013, N.K. Zeng 1379 (FHMU 930); same location, 17 August 2013, N.K. Zeng 1414 (FHMU 959); same location, 16 August 2014, N.K. Zeng 1633 (FHMU 2493). Hainan Province: Dongfang County, Exian Mountain, elev. 633 m, 5 October 2014, N.K. Zeng 1808 (FHMU 2494).

Notes.

Our molecular phylogenetic analyses indicate that the new collections and the holotype of Ch. radiatus , a species first described from Hunan Province of central China, group together with a strong statistical support based on a two-locus dataset (28S + tef1) (data not shown). This indicates that our specimens should be recognized as Ch. radiatus ( Zhang et al. 2015). This species is new to Fujian and Hainan Province. Zhang et al. (2015) reported Ch. radiatus from under Cunninghamia lanceolata (Lamb.) Hook, Cyclobalanopsis spp. and Castanopsis spp. We found the species associated with Pinus spp.