Hypocrella bambusae (Berk. & Broome) Sacc. 1878

Dai, Dong-Qin, Wijayawardene, Nalin N., Tang, Li-Zhou, Liu, Chao, Han, Li-Hong, Chu, Hong-Long, Wang, Hai-Bo, Liao, Chun-Fang, Yang, Er-Fu, Xu, Rui-Fang, Li, Yun-Min, Hyde, Kevin D., Bhat, D. Jayarama & Cannon, Paul F., 2019, Rubroshiraia gen. nov., a second hypocrellin-producing genus in Shiraiaceae (Pleosporales), MycoKeys 58, pp. 1-26 : 1

Hypocrella bambusae (Berk. & Broome) Sacc. 1878 Fig. 8

Basionym.

Hypocrea bambusae Berk. & Broome, 1873

Description.

Parasitic on living inflorescence of bamboo. Sexual morph: Stromata around 0.14 cm diam., 0.06 cm high, solitary, superficial, subglobose, fleshy to coriaceous, black, with around 20 perithecia lining the periphery, with ostioles slightly raised above stroma surface. Stromatic tissue thick, brown to dark brown. Perithecia in vertical section around 100 µm diam., 200 µm high, pyriform, immersed in the periphery layer of stromata. Asci more than 220 µm long, 5-6 µm diam., 8-spored, unitunicate, cylindrical, with a glassy refractive cap around 3 µm from apex to base. Ascospores around 180 µm long, 1-1.5 µm diam., in a single fascicle but not significantly helically coiled, filiform, hyaline, with 9-10 transverse septa, with rounded ends, smooth-walled. Asexual morph: Undetermined.

Material examined.

SRI LANKA, on inflorescence of bamboo, January 1855, G.H.K. Thwaites s.n. (ex herb. M.J. Berkeley), K(M)52469, isotype.

Notes.

This taxon has typical morphology of the Clavicipitaceae , which is pyriform perithecia with a gradually tapering upper part and cylindrical asci with a glassy refractive cap. New collections are required and need to be sequenced to clarify its placement.

Figures

Figure 8. Hypocrella bambusae (K (M) 52469, isotype, images are accredited to the Royal Botanic Gardens, Kew) A, C fruiting bodies on inflorescence of bamboo B vertical section of stromata showing the perithecia locating D herbarium envelope E filiform ascospores F asci with caps (Staining by cotton blue). Scale bars: 5 mm (A), 200 μm (B), 2 mm (C), 20 μm (E, F).