Contents -- Abstract -- Résumé -- Introduction -- Geology and glacial history -- Vegetation, soils, permafrost, and the tree line -- Climate, climate change, and other recent stresses -- Objectives -- Methods -- Data assembly and field surveys -- Data collection areas -- Floristic analysis -- Results -- Data collection areas -- Coincident distribution patterns -- Floristic zonation -- Postglacial origins of the flora -- Early vegetation development -- Species migration -- Widespread species of the Hudson Bay Lowland -- Eastern species of the Hudson Bay Lowland -- Western species of the Hudson Bay Lowland -- Coastal species of the Hudson Bay Lowland -- Widespread coastal species -- Southwest James Bay coastal species -- Arctic species of the Hudson Bay Lowland -- Maritime arctic species -- Non-maritime arctic species -- Other themes in the flora of the Hudson Bay Lowland -- Species introduced into the flora of the Hudson Bay Lowland -- Rare species of the Hudson Bay Lowland -- Conclusion -- Acknowledgements -- References -- Plates -- Appendix A Distribution Maps -- Appendix B Catalogue of the Vascular Plants of the Hudson Bay Lowland -- Appendix C Excluded Records.