Tubers are arranged in a vertical position “hanging” below the round root crown. The cylindrical tubers are less than an inch long and ¼ inch wide. In spring, new white tubers grow around the perimeter of the root crown as the previous year’s now-tan tubers, at the center of the root crown, soften and detach from the root crown. The low-growing plants have slender annual tubers (nutrient storage features) and white string-like (filiform) roots. It is also known as Thick-Root Buttercup.Įarly Buttercup, one of 17 buttercup species in Arkansas, is the only species with tuberous roots. Habitats vary from lightly shaded wooded bottomlands to sunny grasslands and even lawns, in moist or dry, loamy, sandy to rocky soils. In Arkansas, Early Buttercup occurs statewide. the species occurs principally west of the Mississippi River in a broad band from Louisiana and east Texas northward to Minnesota, Wisconsin and Michigan east of the Mississippi River, scattered occurrences are mapped from Mississippi and Georgia north to New York and New England. The specific epithet is Latin for “clustered,” referring to the roots. The genus name is from the Latin for “little frog,” based on the occurrence of many buttercups in moist habitats. Early Buttercup ( Ranunculus fascicularis) of the Buttercup (Ranunculaceae) family is a late winter, herbaceous perennial, with glossy yellow flowers and tuberous, thickened roots.
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