Strobilanthes dyerianus2.jpg diversity of Ruellia flowers.jpg Sanchezia cf. speciosa.jpg Sanchezia sp._Wisui Ecuador.jpg Ruellia longipedunculata.jpg Ruellia strepens_resupinate flowers2.jpg Ruellia jussieuoides.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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