Map showing the continental shelf, island area and Australian phytogeographic subregions (Ebach et al. 2015) that species were coded to in the SSCZ vascular plant checklist. MAS, Mainland Asia; Sum, Sumatra; Bor, Borneo; Jav, Java; Phi, Philippines; Sul, Sulawesi; LSI, Lesser Sunda Islands; Mlk, Maluku Islands; NGu, New Guinea; AKP, Kimberley Plateau; AAL, Arnhem Land; ACY, Cape York Peninsula; AAP, Atherton Plateau; AGS, Great Sandy Desert Interzone; ACD, Central Desert; ACQ, Central Queensland; AEQ, Eastern Queensland; AWD, Western Desert; AED, Eastern Desert; ASe, Southeastern; ASw, Southwestern; ASI, Southwest Interzone; AHa, Hampton; ANu, Nullarbor; AEP, Eyre Peninsula; AAd, Adelaide; AVi, Victoria; ATa, Tasmania.