ABSTRACTBlechnaceae is a medium-sized family of ferns in New Zealand with one genus, 23 indigenous species, two naturalised species and two nothospecies. A new combination, Blechnum × digenum (Parris) Brownsey & Perrie, is made for the hybrid between Blechnum molle (Parris) Christenh. and B. parrisiae Christenh. 11 lectotypes are chosen for basionyms relevant to New Zealand – Lomaria dura T. Moore, L. filiformis A. Cunn., L. membranacea Colenso ex Hook., L. nigra Colenso, L. oligoneuron Colenso, L. parvifolia Colenso, L. paucijuga Colenso, L. pumila Raoul, L. rotundifolia Colenso, Parablechnum procerum var. acuminatum C. Presl, and Stegania procera var. stipulosa A. Rich. No type material has been found for Blechnum capense var. auriculatum Domin, B. capense var. contractum Domin, B. capense var. hookerianum Domin, Lomaria paleacea Potts, or Lomaria pygmaea Colenso, and the types for these names remain undesignated. Lectotypes are being chosen where possible for all names at specific and subspecific rank, for which no holotype was designated by the original author, in order to fix the application of the name concerned. Justification for the choice is provided in each case. This article is a contribution towards clarifying the taxonomic and nomenclatural status of New Zealand plants for the plant names database (Ngā Tipu Aotearoa) and the electronic Flora of New Zealand.