By the 1930s, Florence began to slow down. She sold Gillebreathe on Byron Street in Whitby and purchased a house at 86 Millwood Road in Toronto. She made arrangements to donate some of her artworks to galleries across the country. She died May 1, 1938. Newspaper obituaries recalled her as well-travelled, an outstanding water-colourist, and well-known in the Canadian art scene. Several of her pieces, including 'Afterglow' (1914), an impressionistic view of Inverlynn's pine grove, were purchased by the National Gallery in Ottawa. Other well-known pieces are 'Brittany Girl' (ca. 1914), 'Dressing Table' (ca. 1910), and 'Contentment' (ca. 1913). In 1939, Malloney's Art Gallery, with the help of her friends and relatives, held a memorial show highlighting Florence's oeuvre.

Before travelling to Paris, Florence worked primarily in watercolour. She took lessons from well-known Canadian artists like Lucius O'Brien, F. McGillivray Knowles, and William Cruikshank and her early work reflected the traditional teachings of the Dutch and English art schools. In Paris, Florence began experimenting more with oils, especially its thick application with a pallete knife. The process, pioneered by Russian artist Frederic Fiebig, shifted Florence's art solidly into the Post-Impressionism and modernist styles.