One species, Stratiotes aloides, is native to Europe and NW Asia.
The leaves are serrate and very brittle, breaking easily when handled. Reproduction is generally by offsets, which may number 5 or more per plant. In the UK, male plants have rarely if ever been recorded, although some hermaphrodite flowers have been recorded from more southerly locations. Sexual reproduction is not known to occur.
The plant appears to be associated with calcareous waters and there is a suggestion that changing levels of calcium carbonate on the leaves may explain the floating and submerging behaviour.
- Invading Species.com Partnership between the Ontario Ministry of Natural Resources and the Ontario Federation of Anglers and Hunters
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