Scientific Name:
Oenanthe L., Sp. Pl. 254-255 (1753)

Glabrous annual, biennial or perennial herbs, with fibrous or tuberous roots, often aquatic.  Lvs 1–4-pinnate, sometimes reduced to linear fistulose petioles;  segments broad to narrow.  Umbels compound, often shortly pedunculate and lf-opposed, sometimes terminal;  bracts present or 0, entire;  bracteoles usually numerous, entire.  Petals white or pale pink, somewhat irregular, with apex notched and inflexed;  calyx teeth evident, acute.  Fr. ovoid, cylindric or globose, terete, not beaked, spineless;  commissure broad;  ribs 5 per mericarp, the lateral usually grooved or thickened;  vittae solitary in furrows.

[From:  Webb et al. (1988) Flora of New Zealand. Volume 4.]

Number of species in New Zealand within Oenanthe L.
Exotic: Fully Naturalised2
Exotic: Casual2
Linnaeus, C. 1753: Species Plantarum. Impensis Laurentii Salvii, Stockholm.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.