Ruellia menthoides.jpg Dyschoriste thunbergiiflora.jpg Ruellia purshiana2.jpg Ruellia conzattii.jpg Ruellia ochroleuca_trigonid bee.jpg Ruellia anthracina_photo by STRI.jpg Sanchezia parvibracteata2.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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