Weed of the Month: Common Blue Violet
Roses are red, violets are…this month’s weedy plant! The common blue violet, (Viola sororia), the native Viola species most abundant in the eastern United States, has familiar petite flowers that range in color from deep purple to creamy white and lush, heart-shaped leaves that form a graceful spiral when they first emerge. The genus has been invoked as a symbol of love and modesty by everyone from Sappho to Shakespeare to Christina Rossetti. In the 1930s, a Broadway play even featured a lesbian character who wooed her lady love with violets, inspiring a violet fad as well as its nickname “the lesbian flower.”
Still, as beloved as violets are, they are considered weeds by many people, especially those seeking perfect lawns. Like most weeds, they are very resilient and have multiple strategies for reproducing. They thrive in partial shade and enjoy lots of moisture, and they can be stubborn to combat, resisting even repeated herbicide applications. Their dense, fibrous root system allows them to bounce back after mowing, and they can reproduce vegetatively via underground stems, or rhizomes.
Violets spread by seed, too! When ripe, their Y-shaped seedpods explode with surprising force, shooting seeds far and wide. They also employ myrmecochory, or dispersal by ants. Violet seeds are coated with protein- and lipid-rich morsels, called elaiosomes, which are a tasty, rich ant treat. The ants gather the seeds and bring them back to their nests to feed their larvae. Once the coating is consumed, the ants discard the seeds in their waste piles, effectively planting the seeds—a beautiful example of mutualism!
As if that weren’t enough, violets also produce cleistogamous, or self-pollinating, flowers. If you study a violet plant, you may notice strange, stunted-looking, oblong flowers that never open. These flowers have no need for pollinators—seed production can occur without them.
Violets are also edible. Toss the young leaves and flowers into salad, candy the flowers, or crush the petals to color sugar for decorating. So perhaps give up on that dream of the perfect lawn and instead celebrate the violet for all it has to offer: a colorful delicacy, a botanical curiosity, an interrupter of the mundane, and a treasure trove of cultural history.
The Weed of the Month series explores the ecology and history of the common wild plants that most gardeners consider weeds.
Discussion
Great article, I didn’t know about the ants. I am sad people want to get rid of these. They are a host plant for Fritillary butterflies. These small plants only make your yard more colorful and do not rise above the grass level.
How do I get rid of these. They are taking over my lawn, gardens and pasture. Very destructive.
RM, do you have rabbits? Violets are like catnip to the rabbits in my backyard.
I’ve had a patch of violets in my Texas yard that were healthy for 20 years. Last fall, something began devouring them—they’re almost gone! I’ve tried snail pellets and diatomaceous earth. Any ideas what else I might do before they’re completely destroyed?
So much valuable information. Thank you.
And violets are the host plants for the great spangled fritillary
butterfly. The snazzy caterpillar is black with branched spines that are orangish at the base with black tips.