Tristaniopsis flexuosa (Myrtaceae), a new species from ultramafic soils in the Philippines

A new species of Tristaniopsis (Myrtaceae) from the Philippines, Tristaniopsis flexuosa Fernando & Peter G.Wilson, is formally described and illustrated. At present, the species is known only from a single locality in upper montane forest in extreme ultramafic habitat and we provide an assessment of its conservation status. Its relationship to other Malesian species of Tristaniopsis is discussed, and a key to the identification of the Philippine species provided