Ranunculus ophioglossifolius

Suberect glabrous annual to c. 50 cm high; stems pithy, often rooting from lower nodes. Leaves mostly cauline; petioles of lower leaves to c. 10 cm long, upper leaves shortly petiolate to sessile; lamina ovate to narrowly elliptic, 1.5–6 cm long, 3–20 mm wide; margins entire or obscurely toothed. Flowers several to many in cymes or dichasia; sepals usually 4 or 5, spreading, ovate to obovate, 2–4 mm long, glabrous and yellowish; petals as many as sepals or fewer, spathulate, 2.5–4.5 mm long, usually shortly exceeding sepals, pale yellow; nectary lobe rounded, c. 0.2 mm long, fused only at base; stamens c. 6–10; achenes 20–50, ovate, 2–3 mm long, lenticular, the faces with numerous small tubercles; beak triangular, c. 0.5–1 mm long. Flowers Sep.–Dec.