Calocybe decolorata X.D. Yu & Jia J. Li

Ma, Ao, Hu, Jia-Jun, Chen, Yue-Qu, Wang, Xin, Tuo, Yong-Lan, Yue, Lei, Li, Xue-Fei, Dai, Dan, Wei, Yun-Hui, Zhang, Bo & Li, Yu, 2024, Multiple evidence reveals two new species and new distributions of Calocybe species (Lyophyllaceae) from northeastern China, MycoKeys 103, pp. 37-55 : 37

Calocybe decolorata X.D. Yu & Jia J. Li

Figs 4B , 6

Description.

Basidiomata scattered or gregarious, small to medium. Pileus 1.3-5.0 cm diameter, convex to applanate, involute then becoming reflex, orange-brown (7C8) at center, paler outwards, smooth, hygrophanous; margin petaloid, wavy, orange (6B8). Lamellae subdecurrent, close, white (6A1) at first, black (6E2) at the base to the three-quarter towards the margin when mature, with 1-5 lamellulae, edge denticulate. Stipe 2.3-4.2 cm long and 0.3-0.9 cm wide, central, cylindrical, or enlarged at apex, light orange-brown (6A6), with green tone at center, covered with white tomentose at base, hollow when mature. Context fleshy, thin, odorless.

Basidiospores (2.0)2.9-5.0 × (1.5)2.0-3.2 μm, Q = (1.15)1.17-1.50(1.60), Qm = 1.34, subglobose, hyaline, inamyloid, smooth, thin-walled. Basidia 11.1-21.5 × 3.7-6.0 μm, clavate, 2-spored, occasionally 4-spored, hyaline, thin-walled. Hymenophoral trama regular and hyphae arranged parallel, not pigmented, 2-3 μm wide. Pileipellis an epicutis composed of dense, radially parallel, hyphae 2.5-11.3 μm in width, smooth, hyaline, terminal cells a bulbous shape. Stipitipellis hyphae smooth, pigmented, 2.5-8.8 μm diameter.

Specimen examined.

China. Jilin Province, Changchun City, Jilin Agricultural University, 21 Aug 2019, Jia-Jun Hu and Gui-Ping Zhao, HMJAU48262 (Collection no.: Hu J.J. 591).

Habitat.

Grows on the leaves’ litter in broad-leaved forests.

Comments.

This species was originally described from Liaoning Province, China by Li et al. (2017) and is mainly characterized by a brighter orange or yellow color pileus, light orange-brown stipe, and smaller basidiospores. The species was classified as a species of Sect. Calocybe Carneoviolaceae based on its main morphological characteristics.

However, there are some differences between our specimen and the type specimen. The specimens observed in this study have bulbous-like terminal hyphae in the pileipellis, which were not described in the type species.

Figures

Figure 4. Habitat of Calocybe species in this study A Calocybe ionides B Calocybe decolorata C Calocybe cystidiosa D Calocybe betulicola. Scale bars: 1 cm (A-E).

Figure 6. Microcharacteristics of Calocybe decolorata A basidiospores B basidia C pileipellis. Scale bars: 5 μm (A); 10 μm (B, C).