One of the mysteries of the English language finally explained.
An invasive aquatic American plant which has become naturalized in Europe and is grown in aquaria and ponds.
Elodea canadensis, family Hydrocharitaceae
- ‘Firstly, if it's Canadian pondweed it can drift; I've spent many an hour raking a swim in the past only to find that it's completely covered over again the next day!’
- ‘Anglers, boatmen and rowing clubs are becoming increasingly concerned about the rapid growth of Canadian pondweed in Killarney's lakes.’
- ‘Several new pages have been added to the ‘Christchurch Waterway Plant Guide’; one on lagarosiphon and another to enable egeria, lagarosiphon and Canadian pondweed (Egeria densa, Lagarosiphon major, Elodea canadensis) to be distinguished.’
- ‘In the water common plants are hornwort Ceratophyllum demersum and Canadian pondweed Elodea canadensis, while spiked water-milfoil Myriophyllum spicatum, curly water-thyme Lagarosiphon major, grassy pondweed Potamogeton obtusifolius and hair-like pondweed P. trichoides have all been found.’
- ‘For example, you can remove sizeable quantities of Canadian pondweed from the surface by raking it or by removing it by hand.’
- ‘Weed growth tends to be lush in established pits with gravel bars providing clear oases in the desert of Canadian pondweed.’
- ‘Among the most troublesome are Crassula helmsii (New Zealand pygmyweed), Elodea canadensis (Canadian pondweed), E. nuttallii (Nuttall's pondweed), Lagarosiphon major (curly waterweed), Potamogeton crispus (curled pondweed) and species of Myriophyllum (water milfoil).’
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