Description
Large, upright, bushy, deciduous biennial or perennial (H 80-140 cm, W 40-60 cm). Stems upright, branched, hollow. Leaves finely pinnately dissected, soft, light green. Flowers numerous, tiny, star-shaped, in umbels. Flowering period: June-August. Grows well in wet soils, near water or in shallow water, intolerant of shade.