Check the listing for details. Yellow Violets (Viola Rotundifolia) | Bare-root. Color: Yellow. Listed at 9.95 USD. Yellow violet is unmistakable. It's Missouri's only all-yellow violet. The flower stems arise from axils of upper stem leaves, and not from the base of the plant. The lower 3 petals have purple veining. The species begins flowering on low, small plants and keeps on flowering for a long period, sometimes growing to nearly 2 feet tall. Blooms March–May. Both the basal and stem leaves are heart-shaped with fine scalloping.FlowersYellow violets have five petals, five sepals, five stamens, and a single pistil. The lower petal may have purple veins and form a spur or pouch. LeavesYellow violets have heart-shaped leaves that are either basal or alternate on the stem. StemsYellow violet stems can be smooth or hairy, and may be erect or leaning. HeightYellow violets can grow to be 4–24 inches tall, but often start out low to the ground and grow taller as they mature.