Louis-Marie, Trappist priest, botanist, teacher (b Louis-Paul Lalonde at Montréal 17 Oct 1896; d there 3 Nov 1978). Trained at the Université de Montréal by Frère MARIE-VICTORIN (LSc, 1924) and at Harvard (PhD, 1928), Father Louis-Marie taught botany and genetics at the Institut agricole in OKA, near Montréal, 1923-62. Under his direction the institute's herbarium grew until it contained nearly 100 000 specimens. Known as the Herbier Louis-Marie, it is now at Laval. Author of many scientific articles, Father Louis-Marie is known especially for his Flore manuel (1931), reissued various times, through which several generations of amateur botanists have been introduced to the study of Canadian flora.