Bristly Buttercup (Ranunculus hispidus)
Bristly buttercup is a perennial wildflower native to Wisconsin. It grows most often in upland and mesic woodlands—on slopes, ridges, and open forest floors—rather than in true wetlands. In these habitats it contributes to the spring understory by offering nectar to early pollinators and seed forage for wildlife.
The plant varies in height, typically reaching six to twelve inches, though it can grow taller in ideal conditions. Many individuals remain only a few inches tall, especially in shaded or rocky woodland settings. Its flowers are bright yellow and usually three‑quarters to one inch across. Each bloom has five glossy petals that reflect sunlight, making them both striking and sometimes difficult to photograph. The flowers are borne singly on long, hairy stalks, giving them a delicate look despite the plant’s rugged nature.
The stems are light green and covered in long, spreading hairs—a feature that gives the species its common name. The leaves are usually trifoliate, with each leaflet divided into three lobes and often reaching up to four inches in length. This lobed structure adds to the plant’s visual complexity on the forest floor.
Bristly buttercup begins blooming in May, one of many woodland wildflowers marking the shift into spring and early summer in Wisconsin. Like other members of the buttercup family, it contains mild toxins that can irritate skin or cause digestive discomfort if ingested. The genus name Ranunculus translates to “little frog,” a reference to the damp or shaded habitats favored by many of its relatives.
Despite its toxicity, bristly buttercup plays a useful ecological role. Bees, small flies, and other early-season pollinators visit its flowers for nectar, and its seeds provide food for birds and small mammals.
Sources:
Wisconsin State Herbarium — Ranunculus hispidus
Flora of North America — Ranunculus hispidus
USDA PLANTS Database — Ranunculus hispidus
Illinois Wildflowers — Hispid Buttercup
Minnesota Wildflowers — Hispid Buttercup
Lady Bird Johnson Wildflower Center — Ranunculus hispidus
Britannica — Ranunculus
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