Appendix S1 Taxonomic reviews of south-west Australian Orchidaceae from 1980 onwards.

Appendix S2 Taxa in which herbarium records were supplemented with known locations for analyses of taxon richness and biogeography.

Appendix S3 Taxa included in the analyses, other than currently described taxa.

Appendix S4 Incidence of rarity, mean distribution and mean abundance of orchid genera in the Southwest Australian Floristic Region with reference to pollination strategy and site of mycorrhizal infection.

Appendix S5 An analysis of the taxon richness and endemism in the biogeographic districts of the Orchidaceae of the Southwest Australian Floristic Region.

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