SMALLFLOWER BUTTERCUP, Ranunculus
abortivus L. 1, young plant; 2, plant in bloom; 3,
mature receptacle bearing seeds; 4, seeds. Annual or biennial,
reproducing by seeds. Stems slightly hairy, slender, branched from
base, 6 to 20 inches (15 to 50 cm) tall. Lower leaves round,
bright green with round-toothed margins, borne on long petioles coming
from base of plant. Upper leaves on shorter petioles, divided into 3 to
5 leaflets with somewhat toothed margins. Flowers small, yellow,
with small oblong petals. Seeds produced in round heads, numerous,
flattened with very small curved beak, dull, wrinkled, yellowish-brown.
Found in lowland meadows, pastures, and fields. The plant has no
forage value and may poison livestock.