Kretzschmariella culmorum (Cooke) Y.-M. Ju & J. D. Rogers



For the present, Kretzschmariella includes only K. culmorum based primarily on its anamorph. Large multicellular conidia have not been previously reported in the Xylariaceae, to our knowledge. This anamorph is very similar, if not identical, to Mirandina dactylelloides T. Matsushima which has been reported twice on bamboos from Taiwan and Cuba by Matsushima (1980, 1987). Hoog (1985) considered Mirandina G. Arnaud ex T. Matsushima to be a synonym of Dactylaria Sacc. Owing to the uncertain taxonomic position of M. dactylelloides, however, a formal redisposition into Dactylaria was not made (Hoog, 1985). Samuels et al. (1987) have reported a somewhat similar anamorph under the hyphomycetous genus Ceratosporium Schwein. for Iodosphaeria Samuels, E. Müller & Petrini, a genus with apparent xylariaceous affinities. The teleomorph of K. culmorum is morphologically different from other bambusicolous xylariaceous fungi discussed in this work mainly in its possession of a cellular appendage in some mature ascospores. The exception is Hypoxylon bambusicolum var. chusqueae Pat. which also has a cellular appendage but lacks the hyaline sheath.

Hypoxylon bambusicolum was synonymized with H. culmorum by Shear (1945) and Miller (1961). We have not studied the type of H. bambusicolum, which is at PC (Shear, 1945), but have examined authentic material of Spegazzini at BPI. The synonymy will not firmly be established until the PC type is studied.