Abstract

A systematic study of the endemic Australian sectionPomatoxyris Endl. of the genusXyris is presented. Eighteen species are recognised, ofwhich Xyris atrovirida, X. exilisand X. maxima A.N.Doust & B.J.Conn are described forthe first time. Xyris bracteata R.Br. is reinstated forthe taxon more recently known as Xyris gracilis R.Br.subsp. laxa O.D.Evans.Xyris gracilis R.Br. subsp.tasmanica D.I.Morris is here raised to specific statusas X. tasmanica (D.I.Morris) A.N.Doust & B.J.Conn.All recognised taxa are provided with descriptions, distribution information(including maps), habitat descriptions, nomenclatural and other relevantnotes. Where appropriate, lectotypes are here designated for all previouslydescribed species of section Pomatoxyris Endl. which areaccepted by us. All species are illustrated.