The Genus Senecio (Compositae) on Lord Howe and Norfolk Islands

Two new endemic species from Lord Howe Island, Senecio howeanus and S. pauciradiatus, and two new endemic species from Norfolk Island, S. evansianus and S. hooglandii, are described and discussed. Senecio australis Willd. is also included as a Norfolk Island endemic. The possible affinities of these species are discussed. A number of names previously ascribed to taxa from these islands, either in the literature or as determinations on specimens, are excluded.