water-shield

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• IPA^(key): /ˈwɔːtərˌʃiːld/

water-shield (plural water-shields)

1. An aquatic herbaceous flowering plant widely distributed in North America, the West Indies, northern South America, East Asia, Australia, the Indian Subcontinent and parts of Africa (Brasenia schreberi).
2. An aquatic perennial herbaceous plant native to North and South America (Cabomba caroliniana).

• white alders