Abstract
Abstract Two new species are accepted for the Senecio lautus complex in New Zealand. The first, S. carnosulus, previously treated as a variety or subspecies of S. lautus, is distinguished from S. lautus sens. strict. by being generally larger in all its parts (except the ligules which are shorter), by its more southerly distribution, and a chromosome number of 2n = 80 rather than 2n = 40. As defined here, S. carnosulus occurs in coastal areas from Banks Peninsula southwards to the islands of Foveaux Strait and on Stewart Island. The second species, S. marotiri, is newly described from offshore islands of northern New Zealand. It differs from S. lautus in the more erect habit, in leaf shape, bract and ligule length, and in having a chromosome number of 2n = 80, and from S. carnosulus in the erect habit, in leaf shape, and capitulum shape.
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