TROPICAL PLANT ENCYCLOPEDIA
Alternanthera hassleriana
Hassler's Alternanthera, Neptune's CrownFamily: Amaranthaceae
Origin: South America
A water plant that will float across the water surface. The internodes of Alternanthera aquatica are filled with air, as adaptation to its life as a floating plant, and look "bloated". Dainty white flowers.
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Link to this plant:
https://toptropicals.com/catalog/uid/alternanthera_hassleriana.htm