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Leptograpium
Conidiophores very dark and stout, bearing a brush-like apical branching structure that is terminated by tapered annellides. The colourless 1-celled spores (conidia) are produced continuously from the tips of the annelides and collect in a large drop of fluid. Phialocephala species are related but differ in having phialides. Species of Thysanophora are similar but have conidiophores with short swollen branches bearing phialides in a manner strongly reminiscent of Penicillium species. On wood and conifer needles.
Ophiostomataceae ( Ohiostomatales, Sordariomycetidae). Holomorph: Grossmannia, Ophiostoma. Ref: Ellis 1971