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Ruellia macrophylla var. lutea.jpg Ruellia jaliscana_illustration by A. Labadie.jpg Brillantasia nyanzarum.jpg Ruellia humilis.jpg Ruellia hygrophila.jpg Dyschoriste hirsutissima.jpg Strobilanthes atropurpureus2.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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