Other names:Potamogeton pectinatus
Threat category:At Risk: Naturally Uncommon ?
Regions:Northland, Auckland, Waikato, Bay of Plenty, Gisborne, Hawkes Bay, Manawatu-Wanganui, Taranaki, Wellington, Nelson-Tasman, Marlborough, Westcoast, Canterbury, Otago, Southland
Distribution:North and South Islands
- This species was previously known as Potamogeton pectinatus.
- Entirely submersed plant with stems to 2 m long, and dark green, threadlike, sharp-tipped leaves to 5-12 mm long. Leaf bases have a stipule (scale leaf) which wraps around the stem. The inflorescence is a spike to 4 cm long, with flowers at intervals along it.
Distribution and Habitat
- North and South Islands, from lower Northland to Otago, in still, lowland waters, often brackish and usually near the coast, but also inland.
- Habitat modification and loss, including hydrological changes.
- Invasion of aquatic weeds.
- Eutrophication due to nutrient runoff.
- Survey for new locations.
- Mark known sites.
- Protection of habitat.
- Possum control by poisoning or trapping.
- Ensure that forest owners in the Volcanic Plateau area are aware of potential habitats and can recognise the species.
- Check existing populations annually.
- Report new locations to DOC and NZPCN.
Further Information and Support
- New Zealand Plant Conservation Network (NZPCN). http://www.nzpcn.org.nz
- Johnson & Brooke (1989). Wetland plants in New Zealand. DSIR Publishing, Wellington