A taxonomic revision of Euphorbia section Anisophyllum Roeper (Euphorbiaceae) in Australia

A systematic study of Euphorbia section Anisophyllum Roeper in Australia is presented. A total of 58 species are recognised of which 51 are native (48 endemic) and seven are naturalised. Twenty one species are described here as new: E. accedens Halford & W.K. Harris, E. albrechtii Halford & W.K. Harris, E. crassimarginata Halford & W.K. Harris, E. fitzroyensis Halford & W.K. Harris, E. gregoriensis Halford & W.K. Harris, E. hassallii Halford & W.K. Harris, E. laciniloba Halford & W.K. Harris, E. litticola Halford & W.K. Harris, E. macdonaldii Halford & W.K. Harris, E. multifaria Halford & W.K. Harris, E. occulta Halford & W.K. Harris, E. papillata Halford & W.K. Harris, E. papillifolia Halford & W.K. Harris, E. philochalix Halford & W.K. Harris, E. porcata Halford & W.K. Harris, E. psilosperma Halford & W.K. Harris, E. thelephora Halford & W.K. Harris, E. trigonosperma Halford & W.K. Harris, E. verrucitesta Halford & W.K. Harris, E. vicina Halford & W.K. Harris and E. victoriensis Halford & W.K. Harris. New species are illustrated while all species are described and their distributional range mapped, and notes on their distribution, habitat and phenology are given. Eleven new varieties are described as new: E. australis var. glabra Halford & W.K. Harris, E. australis var. hispidula Halford & W.K. Harris, E. ferdinandi var. appendiculata Halford & W.K. Harris, E. ferdinandi var. saxosiplaniticola Halford & W.K. Harris, E. inappendiculata var. robustior Halford & W.K. Harris, E. mitchelliana var. longiloba Halford & W.K. Harris, E. papillata var. laevicaulis Halford & W.K. Harris, E. papillifolia var. polyandra Halford & W.K. Harris, E. thelephora var. australis Halford & W.K. Harris, E. thelephora var. rugosa Halford & W.K. Harris, and E. vaccaria var. erucoides Halford & W.K. Harris. The new combinations E. macdonaldii var. potentillina (Baill.) Halford & W.K. Harris, based on E. australis var. potentillina Baill., E. mitchelliana var. filipes (Benth.) Halford & W.K. Harris, based on E. filipes Benth., and E. schultzii var. comans (W.Fitzg.) Halford & W.K. Harris based on E. comans W.Fitzg., are made. Lectotypes are chosen for E. alsiniflora Baill., E. armstrongiana Boiss., E. australis var. semiglabra Domin, E. comans W.Fitzg., E. distans W.Fitzg., E. erythrantha F.Muell., E. inappendiculata Domin, E. filipes Benth., E. macgillivrayi Boiss., E. macgillivrayi var. yarrabensis Domin, E. macgillivrayi var. pseudoserrulata Domin, E. macgillivrayi f. glabrata