Oenanthe pimpinelloides

Erect herb, 0.3–1 m high, stems striated, solid; roots with rounded tubers towards end. Basal leaves 2-pinnate, segments cuneate, lanceolate to ovate, 2–5 mm long, lobed; stem leaves 1–2-pinnate, segments cuneate, lanceolate to ovate, 1–3 cm long, usually entire. Umbels terminal, 2–5 cm diam.; peduncle 4–10 cm long; rays 6–15, 1–6 cm long; umbellules with 10–20 or more, crowded, almost sessile flowers; bracteoles 3–6, ovate, 2–3 mm long. Petals white, c. 1.2 mm long. Fruit cylindric, c. 3 mm long, strongly ribbed, appearing spined by the stiff persistent sepals and erect stigmas at apex. Flowers Nov.–Dec.