The genus Zieria (Rutaceae): a systematic and evolutionary study

Abstract

The taxonomy of Zieria Sm. is reassessed and a revised classification is presented. The history of taxonomic discrimination in Zieria is summarised and its cytology, phytochemistry and biology reviewed; the generic relationships and phylogeny are assessed. The monophyly of the genus is discussed and its recognised taxa assigned to six taxon groups. Of the 73 previously published names, 20 names are re-instated and four new combinations established; 20 new species¹ and eight new subspecies are described, bringing the total for the genus to 51 taxa (i.e. 42 species and nine infraspecific taxa). Lectotypes and neotypes are chosen where necessary, for a number of earlier names. Keys to all taxa, distribution maps, illustrations of most taxa and electron micrographs of a range of morphological features are provided. Taxa described as new are as follows: Z. arborescens Sims subsp. decurrens J.A.Armstrong, Z. arborescens Sims subsp. glabrifolia J.A.Armstrong, Z. aspalathoides A.Cunn. ex Benth. subsp. brachyphylla J.A.Armstrong, Z. baeuerlenii J.A.Armstrong, Z.buxijugum J.D.Briggs & J.A.Armstrong, Z. caducibracteata J.A.Armstrong, Z. citriodora J.A.Armstrong, Z. covenyi J.A.Armstrong, Z. floydii J.A.Armstrong, Z. formosa J.D.Briggs & J.A.Armstrong, Z. furfuracea R.Br. ex Benth. subsp. euthadenia J.A.Armstrong, Z. furfuracea R.Br. ex Benth. subsp. gymnocarpa J.A.Armstrong, Z. hindii J.A.Armstrong, Z. ingramii J.A.Armstrong, Z. lasiocaulis J.A.Armstrong, Z. littoralis J.A.Armstrong, Z. minutiflora Domin subsp. trichocarpa J.A.Armstrong, Z. montana J.A.Armstrong, Z. odorifera J.A.Armstrong, Z. oreocena J.A.Armstrong, Z. parrisiae J.D.Briggs & J.A.Armstrong, Z. prostrata J.A.Armstrong, Z. robertsiorum J.A.Armstrong, Z. smithii G.Jackson subsp. tomentosa J.A.Armstrong, Z. southwellii J.A.Armstrong, Z. tuberculata J.A.Armstrong, Z. veronicea (F.Muell.) Benth. subsp. insularis J.A.Armstrong and Z. verrucosa J.A.Armstrong. The following new combinations are made: Z. adenodonta (F.Muell.) J.A.Armstrong, Z. fraseri Hook. subsp. compacta (C.T.White) J.A.Armstrong and Z. obovata (C.T.White) J.A.Armstrong.