Read and take notes about Demuth’s art and artists. Peruse the collections, particularly the flowers.
Watch the first 3 minute of the video and pay close attention to how he paints negative space and creates a push and pull between the figure and ground. Pay special attention to the flower paintings and the tree painting at 2:58.
(Also refer to google images search for “Charles Demuth’s floral paintings” and for “Charles Demuth’s archtectural paintings”)