In 1935, in the midst of an economic crisis, it took the energy, charisma and sense of organization of Marie-Victorin, assisted by his collaborators, to bring the manuscript to the presses of the Brothers of the Christian Schools.

[4][5][6] Preface — Historical and bibliographical summary of Laurentian botany — General outline — Synopsis of systematic groups — Artificial key to plants of Quebec — Pteridophytes — Spermatophytes — Gymnosperms — Angiosperms — Dicotyls — Monocotyls — Glossary — Abbreviations of author names — Alphabetical index (Marie-Victorin, p. 4, 1935)[3]Recent publications are still available in bookstores, educational institutions, public libraries and on line, the work published for the first time in 1935,[1] in large format, has undergone several reissues:[4]

[3] Jacques Rousseau, who would later become a botanist and ethnologist of international reputation[8] is the author of the " artificial key of Quebec plants ”, which, by avoiding overly technical elements and using the simplest and easiest to perceive characters, « allows even beginners and amateurs to orient themselves and arrive at the desired identification ».

[9] For his part, Jules Brunel, Marie-Victorin's assistant at the Montreal Botanical Institute, was responsible for preparing the manuscripts, checking the documentation and correcting the proofs.

The publication of the first edition of Flore laurentienne was an event awaited by Quebec society at the time; it is announced on the front page of the daily Le Devoir.