Incorporation of the Australian genera Halosarcia, Pachycornia, Sclerostegia and Tegicornia into Tecticornia (Salicornioideae, Chenopodiaceae)

Recent molecular and morphological studies have shown that the genera Halosarcia, Pachycornia, Sclerostegia, Tecticornia and Tegicornia are closely related and form a monophyletic group. Support for the monophyly of the individual genera in the group is lacking, with the smaller genera nested in a paraphyletic Halosarcia. In light of this it is proposed that these genera be subsumed into a single genus for which the most appropriate available name is Tecticornia. A conspectus is provided of all species in the expanded Tecticornia, with new combinations given for 30 species and 13 subspecies.

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