Abstract
Two endemic Philippine species of Ixora collected in southern Leyte were studied, and investigation of type and other herbarium specimens revealed that one of the species is I. longissima Merr., and that the other does not match any of the known Philippine Ixora species. The recollection of I. longissima after almost a century was essential to investigate whether or not it is conspecific with I. salicifolia DC. This study supports the synonymy of I. longissima and I. salicifolia and provides a full description and illustration of the new species, Ixora silagoensis Manalastas, Banag & Alejandro. The conservation status of I. silagoensis is assessed as ‘Critically Endangered’ (CR) based on the criteria of IUCN.
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