Synonyms: Blechnum attenuatum; Blechnum attenuatum var. attenuatum; Blechnum attenuatum var. confine; Blechnum attenuatum var. giganteum; Blechnum attenuatum var. holstii; Blechnum confine; Blechnum giganteum; Blechnum heterophyllum; Blechnum polypodioides var. holstii; Lomaria acuminata; Lomaria attenuata (homotypic); Lomaria circinnata; Lomaria confine; Lomaria confinis; Lomaria decipiens; Lomaria gigantea; Lomaria hamata; Lomaria heterophylla; Onoclea attenuata (homotypic); Spicanta attenuata (homotypic)