
Taxonomic status of five species of Grimmia Hedw. (G. minuta Mull.Hal., G. suborthotrichacea Mull.Hal., G. defoliata Mull.Hal., G. genuflexa Mull.Hal., and G. orthotrichacea Mull.Hal.) is appraised. All these species correctly belong within the genus Bucklandiella Roiv. They are actually inseparable from one another and represent a single species for which B. orthotrichacea (Mull.Hal.) Bednarek-Ochyra & Ochyra is chosen as the final name. The remaining four names are considered its synonyms, all but G. genuflexa being new. All the names are lectotypified and some details of the leaves of G. minuta and G. defoliata are illustrated.
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