Berula erecta

Aquatic or semi-aquatic herb 30–100 cm high; stems branched, hollow, striate to furrowed. Emergent leaves once-pinnate, submerged leaves 3–4-pinnate, lamina 12–40 cm long, 1.5–12 cm wide; leaflets 15–21, oblong-lanceolate or c. ovate, 8–56 mm long, 4–35 mm wide, toothed, sessile. Umbels 3–6 cm diam.; peduncles 3–8 cm long; bracts lanceolate, uneven, 10–20 mm long; rays 6–20, unequal, to 20 mm long; umbellules 6–12 mm diam., 9–22-flowered, bracteoles linear or lanceolate, 2–3.5 mm long; pedicels to 5 mm long. Petals c. 1 mm long, white. Fruit 1.5–2 mm long.