Ruellia neesiana_resupinate flowers.jpg Ruellia noctiflora2.jpg Ruellia matudae.jpg Dyschoriste thunbergiiflora.jpg Tetramerium sp.jpg Ruellia bourgaei_food for herbivores.jpg Ruellia abbreviata.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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