Cantharellus yunnanensis W.F. Chiu

Shao, Shi-Cheng, Liu, Pei-Gui, Wei, Tie-Zheng & Herrera, Mariana, 2021, New insights into the taxonomy of the genus Cantharellus in China: epityfication of C. yunnanensis W. F. Chiu and the first record of C. cibarius Fr., Cryptogamie, Mycologie 20 (3), pp. 25-37 : 27-32

Cantharellus yunnanensis W.F. Chiu

( Figs 2-3 )

In Acta Microbiologica Sinica 13 (2): 129 (1973).

MYCOBANK. — 310378.

HOLOTYPE. — (design. Chiu, 1973): Kunming , Yunnan, China. S. C. Shen (8090).

ORIGINAL DESCRIPTION. — Pileus 1.5-2.5 cm, curved; shallowly depressed in the center; faint yellow (capucine buff), very fine pubescence on the pileus; waves on the margin, decurved. Hymenophore pale to pale salmon depending on age, ridge-like gill folds, distant, dichotomous branching. Stipe 0.5-1 × 3-5 cm, irregular dimples, and fibrous tints, slightly tapering toward the base, pale. Basidiospores ellipsoid, slight olive color, 2-2.5 × 0.5-0.8 µm.

MYCOBANK. — 393369.

ADDITIONAL MATERIAL EXAMINED. — China. Yunnan Prov., Kunming, 11.VIII.1942, S. C. Shen 8090 (HKAS[HMAS 4090], holo-); Yunnan Prov., Kunming, China, 2100 m alt., 19.VIII.2007, XieXD174 (HKAS[HKAS 55817]); Yunnan Prov., Dali, 2550 m alt., 18.VIII.2007, ShiXF 126 (HKAS[HKAS 55749]), ShiXF 134 (HKAS[HKAS 55750]), ShiXF 137 (HKAS[HKAS 55751]); Guizhou Prov., Bijie, China, 2300 m alt., 12.VII.2008, TianXF 298 (HKAS[HKAS 55771]); Guizhou Prov., Bijie, China, 2300 m alt., 20.VIII.2008, TianXF351 (HKAS[HKAS 55782]); Yunnan Prov., Kunming, China, 2000 m alt., 29.VII.2008, TianXF 12 (HKAS[HKAS 55804]), TianXF 13 (HKAS[HKAS 55805]), TianXF 5 (HKAS[HKAS 55810]); Guizhou Province, Bijie, China, 2300 m alt., 01.VII.2009, ShaoSC 1 (HKAS[HKAS 58195]), ShaoSC 2 (HKAS[HKAS 58196]); Yunnan Prov., Kunming, China, 2100 m alt., 30.VII.2009, ShaoSC 6 (HKAS[HKAS 58200]), ShaoSC 7 (HKAS[HKAS 58201]); Yunnan Prov., Xishuangbanna, China, 680 m alt., 29.VIII.2009, ShaoSC 76 (HKAS[HKAS 58205]); Yunnan Prov., Puer, 900 m alt., 26.VII.2009, ShaoSC 100 (HKAS[HKAS 58210]); Yunnan Prov., Kunming, China, 2050 m alt., 26.VIII.2009, ZhangJP 17 (HKAS[HKAS 58215]); Yunnan Prov., Chuxiong, China, 2200 m alt., 11.IX.2009, ZhangJP 117 (HKAS[HKAS 58225]); Yunnan Prov, Kunming China, 2100 m alt., 03.IX.2019, Herrera 263C (HKAS[HKAS 107313], epitypus hic designatus), Herrera 264C (HKAS[HKAS 107314]), Herrera 265C (HKAS[HKAS 107315]), Herrera 266C (HKAS[HKAS 107316]).

EPITYPE DESCRIPTION

Basidiomata

Obviously fleshy, medium-sized, 20-60 mm in height.

Pileus

30-100 mm in diam., initially slightly convex to convexplanar, later becoming more or less planar with age; margin incurved or straight, regular or folded, smooth, thin; with surface smooth to minutely pubescent, yellow (4A2, 4A3, A4A, A45).

Hymenophore

With well-defined gill-like folds, up to 3 mm and 0.8-1.5 mm intervals decurrent, forking and anastomosing only near the cap margin, bright yellow (3A8, 4A5, 4A6, 4A7) at the insertion with the margin and pale yellow (4A2, 4A3) at the insertion with the stipe.

Context

Solid, fleshy, whitish (3A3), at mid-radius much thinner, 2-15 mm thick, unchanging.

Stipe

20-60 × 5-15 mm solid, subcylindrical tapering downwards, concolorous with the hymenophore (4A2, 4A3), surface glabrous to pubescent mainly in the insertion with the hymenophore.

Odor

Mild, agreeable, fruity.

Taste

Mild, agreeable.

Spore print

No color.

Basidiospores

Broadly ellipsoid or ellipsoid, smooth, colorless, and hyaline, thin-walled, (6.5-) 7-8 (-8.5) × 5-6 (-6.5) µm. Xm= 7.85- 8.17 × 5.88 µm, Q = 1.30-1.55.

Basidia

60-95 × 7-12 µm long and slender, narrowly clavate to subcylindrical, with 2-6 sterigmata, most commonly 4 sterigmata.

Cystidia

Absent.

Hymenophoral trama

Composed of filamentous hyphae (2.5-) 3-5 (-6.0) µm diam., colorless, thin-walled in an irregular arrangement.

Pileipellis

Mainly of the cutis type, in some areas of the surface, the terminal hyphae can be erected, forming an intricate trichoderm and cluster of hyphae. The hyphae of the pileipellis are 3-9 µm diam., intermingled in a compact (cutis) or slightly loose (trichoderm) arrangement, cylindrical, hyaline to yellowish, often with light yellow contents in some, light yellow-colored in groups, slightly thick-walled (<1 µm thick); distinctive terminal elements 25-77 × 5-10 µm broad, slightly thick-walled (<1 µm thick).

Pileus trama

Composed of cylindrical to inflated hyphae, 3-6 µm diam., slightly thick-walled (<1 µm thick), hyaline, yellowish in mass, some of the hyphal segments filled with yellow contents.

Clamp connections

Present in all tissues examined.

HABIT, HABITAT AND DISTRIBUTION. — Single to caespitose, forming ectomycorrhizae with Pinus kesiya var. langbianensis , P. armandii and Fagacea spp. Widely distributed in Yunnan and Guizhou Provinces, Southwestern China.

NOTES

Cantharellus yunnanensis was described as showing pale to pale salmon coloration with ridge-like gill folds, while our samples displayed a bright yellow, well-defined gilllike folds of up to 3 mm high and 0.8-1.5 mm wide. However, it is possible that the original description was based on dried material ( Fig. 4 ). Additionally, the original description lacks some morphological information that is of taxonomic significance for the subgenus Cantharellus , e.g., the presence of clamp connections and thick-walled hyphal extremities in the pileipellis ( Buyck et al. 2014). A cautious check of the holotype revealed important differences in the shape (ovoid, smooth, and pale olive) and size (7.5-8.0 × 6.5-7.0 µm) of the spores, compared to the original description ( Chiu 1973). Additionally, we found smaller basidiospores that we interpreted as immature spores from young fruit bodies. Unfortunately, we could not obtain a sequence from the holotype due to the long period of preservation in the herbarium. Cantharellus yunnanensis is one of the most popular chanterelles in the edible mushroom markets of Yunnan Province. The lack of an accurate description or sequence allowed us to select a suitable collection as the epitype.

Figures

FIG. 2. — Cantharellus yunnanensis W.F. Chiu: A, basidiomes Herrera 263C (epitype); B, C, surface of the pileus; D, hymenophore; E, surface of the stipe. Scale bars: A, 10 mm; B-E, 2 mm.

FIG. 3. — Cantharellus yunnanensis Herrera 263C: A, spores;B, basidia;C, terminal hyphae of the pileipellis.Scale bars:A,25 μm;B-C,10 μm.

FIG. 4. — Cantharellus yunnanensisW.F.Chiu,holotype S.C.Shen (8090).