Chlorociboria herbicola H.D. Zheng & W.Y. Zhuang, 2017

Zheng, Huan-Di & Zhuang, Wen-Ying, 2017, A new species of Chlorociboria (Helotiales, Ascomycota) on herbaceous stems from China, Phytotaxa 312 (1), pp. 111-111 : 111

Chlorociboria herbicola H.D. Zheng & W.Y. Zhuang , sp. nov. Fig. 1

Fungal Names FN570380

Type:— CHINA. Hubei Province: Shennongjia, Dalongtan, alt. 2000 m, 14 September 2014, on dicotyledonous herbaceous stem, H.D. Zheng, Z.Q. Zeng, W. T. Qin & K. Chen 9528 (holotype, HMAS 273905).

Etymology:—The specific epithet refers to the substrate of the fungus.

Apothecia scattered, discoid, flat to slightly concave when fresh, centrally stipitate, 0.5–1.2 mm in diam.; hymenium surface light blue-green when fresh,orange with blue-green tint when dry, receptacle surface concolorous with hymenium, glabrous or nearly so; stipe concolorous and homogenous with receptacle, 0.3–0.5 mm long. Ectal excipulum of textura prismatica, non-gelatinous, 25–45 μm thick, hyphae parallel to receptacle surface, cells subhyaline or with pale bluish green pigments, with walls thin to slightly thick, 12–20 × 4–6 μm. Medullary excipulum of textura porrecta to textura intricata, 40–110 μm thick, hyphae hyaline, 2–3 μm wide. Subhymenium not distinguishable. Hymenium subhyaline, 70–90 μm thick. Asci arising from croziers, 8-spored, cylindrical-clavate, apex round, J+, apical ring bluing as two lines in Melzer’s reagent and Lugol’s solution without KOH pretreatment, Hymenoscyphus - type, 60–70 × 5.5–7 μm. Ascospores irregularly uniseriate to irregularly biseriate in the asci, elongate-ellipsoidal with rounded ends, equilateral to slightly flattened at one side, non-septate, hyaline, containing a few small to medium-sized guttules, 10.5–13.2 × 2.8–3.5 μm. Paraphyses cylindrical, hyaline, 1.5−2.2 μm wide, not exceeding the asci.

Figures

FIGURE 1. Chlorociboria herbicola H.D. Zheng & W.Y. Zhuang (HMAS 273905). A: Fresh apothecia on natural substrate. B: Dry apothecium (upper surface). C: Dry apothecium (lower surface). D: Partial rehydrated apotheium (lower surface); E: Longitudinal section of apothecium. F: Structure of margin. G: Excipular structure of flank. H: Asci. I: Croziers at ascus bases. J: IKI reaction of apical rings. K & L: Ascospores. Mounting media: D water; E–I, K lactophenol cotton blue; J & L Melzer’s reagent. Bars: A 2 mm; B–D 0.2 mm; E 100 μm; F & G 20 μm; H 10 μm; I–L 5 μm.