Abstract
A new species, Nectria zangii, is described on Populus branches from Donglingshan in western Beijing. The anatomy of perithecia, which become cupulate when dry, and positive reactions to KOH and lactic acid of the fungus indicates that this species belongs in the genus Nectria. It is characterized by small, non-septate, allantoid ascospores and small, subcylindrical to narrowly clavate asci. Sequence analysis of the combined nuclear ribosomal DNA ITS1-5.8S-ITS2 and partial β-tubulin gene confirm its taxonomic position in Nectria as a species new to science.
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