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Abstract
Brachythecium dieckii Roell and B. salteri Card. & Dix. are removed from the synonymy of B. velutinum (Hedw.) B., S. & G. The two first names belong to the same species, B. dieckii having priority. Brachythecium dieckii has more strongly prorate upper abaxial nerve cells than B. velutinum, it has scattered prorate upper lamina cells, more broadly recurved and more coarsely denticulate leaf margins, and it has more regular, more incrassate alar cells in larger groups that extend further up along the leaf margin than in B. velutinum. B. dieckii is known from central Spain and from the Canary Islands