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Ruellia saeri.jpg Ruellia fulgida.jpg Heteradelphia paulojaegeria.jpg Ruellia macrophylla var. lutea.jpg Ruellia anthracina_photo by STRI.jpg Ruellia matudae.jpg Tetramerium sp.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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