Abstract

Three new species of Hymenoscyphus collected from tropical regions of China are described and illustrated. Hymenoscyphus magnicellulosus possesses whitish sessile apothecia with large-celled textura prismatica at flank and isodiametric cells at the base, and inequilateral ellipsoid ascospores 12.5–19(–22) × 4.5–6.7 μm. Hymenoscyphus uniseptatus has white stipitate apothecia, rectangular ectal excipular cells, broadly clavate asci, and broadly fusoid 1-septate ascospores 16.7–20.5 × 5–6.5 μm. Hymenoscyphus yunnanicus is characterized by cream to light yellow stipitate apothecia, narrow ectal excipular hyphae, and multiguttulate fusoid ascospores 16.5–19.5 × 5–5.6 μm. Comparisons were made among the new species and their morphologically similar fungi.

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