Ruellia bourgaei_pollen.jpg Ruellia jussieuoides.jpg Ruellia morongii.jpg Ruellia neesiana.jpg Ruellia neesiana_resupinate flowers2.jpg Strobilanthes dyerianus_reduced filament curtain.jpg Ruellia humboldtiana_fruit.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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