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Justicia sp.jpg Ruellia jaliscana_vegetative in field.jpg Ruellia saeri.jpg Ruellia caroliniensis.jpg Ruellia noctiflora.jpg Ruellia humboldtiana_fruit.jpg Anoura caudata_nectivorous bat.jpg

Acanth Fact of the Day

A major clade within Acanthaceae is the cystolith clade. Cystoliths are anatomical structures found in leaves and are thought to be composed of calcium carbonate or calcium oxalate. Their function is unknown.
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