Catharine Parr Traill, née Strickland, pioneer writer, botanist (b at London, Eng 9 Jan 1802; d at Lakefield, Ont 29 Aug 1899). In 1832 Traill immigrated to Canada with her husband, half-pay Lieutenant Thomas Traill, and settled on the Otonabee River near Peterborough, next door to her sister Susanna Moodie.
Frère Marie-Victorin (born Conrad Kirouac), member of the Brothers of the Christian Schools, botanist, teacher (born 3 April 1885 in Kingsey Falls, QC; died 15 July 1944 in St-Hyacinthe, QC).
Alf Erling Porsild, botanist, northern explorer (b at Copenhagen, Denmark 17 Jan 1901; d at Vienna, Austria 13 Nov 1977).
André Michaux, botanist, explorer (b near Versailles, France 8 Mar 1746; d on Madagascar 11 Oct 1803?). He compiled the first North American flora which includes many plants collected in Lower Canada in 1792.