Subordinate Taxa
Scientific Name:

Herbs or subshrubs, mostly hydrophytic and often aquatic;  stems with monostelic anatomy.  Lvs alternate, opposite or whorled, exstipulate, the submerged lvs often finely dissected.  Fls solitary and axillary, or in spikes or panicles, small, ☿ or unisexual, actinomorphic.  Calyx tube adnate to ovary;  lobes 2, 4 or 0.  Petals 2, 4–(8) or 0, valvate or nearly so, reflexing, often caducous.  Stamens 2, 4 or 8, antipetalous, epipetalous; anthers basifixed.  Ovary inferior, (2)–4-celled;  each cell with 1–2 ovules; ovules pendulous from apex.  Styles (2)–4, free;  stigmas capitate and sometimes fimbriate.  Fr. usually a small, often winged, rugose or tuberculate nut, sometimes a schizocarp separating into 1-seeded mericarps (nutlets).  Seeds endospermic;  embryo straight.

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

Number of species in New Zealand within Haloragaceae
Indigenous (Endemic)7
Indigenous (Non-endemic)3
Exotic: Fully Naturalised3
Cronquist, A. 1988: The evolution and classification of flowering plants. The New York Botanic Gardens, New York.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.