Starry rosinweed (Silphium asteriscus)
Click on terms for botanical definitions.
Starry rosinweed is a robust wildflower that occurs naturally in flatwoods, sandhills and disturbed areas. Its bright showy flowers attract a variety of butterflies, native bees and other pollinators. Birds will eat its seeds.
Flowerheads are large, up to 2½ inches in diameter. They are composed of many bright yellow ray florets surrounding yellow to green disk florets. Flowerheads are born on branched stems and supported by an involucre of large bracts. Leaves have a rough surface, toothed margins, and are arranged opposite to alternate. Seeds are borne in winged achenes.
The common name rosinweed refers to the gummy or resinous substance found in the stems. Native Americans chewed stems to clean their teeth.
Family: Asteraceae (Aster, daisy or composite family)
Native range: Panhandle, and south along western portion of state
To see where natural populations of starry rosinweed have been vouchered, visit www.florida.plantatlas.usf.edu.
Soil: Slightly moist to dry, sandy or loamy soils
Exposure: Full sun to partial shade
Growth habit: 3–4’ tall
Garden tips: Starry rosinweed is especially loved because it blooms over a long period of time, producing blooms from spring well into the fall season. It attracts a variety of butterflies, bees and other pollinators and is a striking addition to any wildflower garden. It is a prolific seeder and will typically self-seed if allowed, although seed collection is also easy (simply remove the dried, dead flowerheads). The natural range of Starry rosinweed is limited to the west side of the state, however, it performs well through much of the state. The plant will persist in the landscape, although it may die back in the winter, and can reseed on its own. It is fairly drought resistant.
Starry rosinweed is often available at nurseries that specialize in native plants. Visit PlantRealFlorida.org to find a native nursery on your area. Seeds are also available through the Florida Wildflowers Growers Cooperative.