[1][2] Keraudren-Aymonin was the third of six children born to Joseph Marie Keraudren and Rose Emilie Boëzennec.
In 1955 she was commissioned by Henri Humbert, then chair of phanerogamy at the French National Museum of Natural History, to do a work on flower analysis and botanical illustrations.
She later continued her work at the Chair of Phanerogamy and in 1971 was appointed deputy director of the National Museum of Natural History of France, in Paris.
[2] Keraudren-Aymonin's research focus was on the systematics, phytogeography, biology and ecology of the Malagasy flora.
She also contributed significantly to the series Flore de Madagascar et des Comores: plantes vasculaires by Henri Humbert and Jean-François Leroy, where she published seven monographs.