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Ruellia mcvaughii.jpg Ruellia noctiflora.jpg Ruellia palustris_retinacula.jpg Ruellia malacosperma.jpg Ruellia bourgaei_food for herbivores2.jpg Ruellia pittieri.jpg Ruellia lactea_rosette form.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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