Ruellia strepens_non-resupinate flowers2.jpg Ruellia humboldtiana.jpg Ruellia menthoides.jpg Sanchezia parvibracteata2.jpg Ruellia bourgaei_food for herbivores.jpg Ruellia fulgida.jpg Ruellia hygrophila.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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