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Individual flowers of hairy buttercup have five sepals, each 1/8-1/4" long with a sharp transverse fold at their base such that the sepals point down (are reflexed), parallel to the stem. There are five petals that are 7-10 mm long and 4-8 mm wide, roughly egg shaped, with the upper surface a brilliant, glossy yellow. Finally, two to three dozen yellow stamens with yellow anthers surround a yellowish-green central ovary with plate-like segments radiating out from the center of the ovary, each with a blunt, short style. The fruit develops by an enlargement of each of these segments, which remain attached to each other. Hairy buttercup is easily confused with early buttercup (Ranunculus fascicularis), but the sepals of early buttercup lie parallel to the petals (horizontal) while the sepals of hairy buttercup have a distinct transverse fold at their base such that the sepals lie parallel to the floral stem, at a steep angle to the petals.

Ranunculus

Ranunculus sardous

hairy buttercup [Blooms: May-Jun]

Cursed crowfoot flowers occur on the ends of the upper stems. Individual flowers are 6-8 mm across with five yellowish-green sepals about the same length as the petals, five (sometimes three or four) yellow, rounded petals, a ring of 5-10+ short stamens with yellow anthers, and a central hemispherical to gumdrop-shaped mass of green pistils. After fertilization, the central mass of pistils enlarges and elongates, producing a cylindrical mass of flat, smooth, kidney-shaped 1 mm long seeds with short, straight beaks.

Ranunculus

Ranunculus sceleratus

cursed crowfoot [Blooms: May-Jul]