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Eranthemum nervosum.jpg Justicia sp2.jpg Sanchezia parvibracteata2.jpg Ruellia macrophylla var. lutea.jpg Ruellia chartacea_bract.jpg Ruellia ochroleuca_trigonid bee.jpg Ruellia tuberosa.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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