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Stenostephanus sp.jpg Ruellia pringlei2.jpg Ruellia ochroleuca_trigonid bee.jpg Ruellia hirsutoglandulosa.jpg Ruellia jaliscana_illustration by A. Labadie.jpg Ruellia humboldtiana.jpg Strobilanthes dyerianus2.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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