Anoura caudata_nectar bat with pollen on head.jpg Ruellia exilis_photo by Ricardo Kriebel.jpg Strobilanthes dyerianus2.jpg Ruellia mcvaughii.jpg Ruellia simplex_fruits with retinacula.jpg Ruellia breedlovei_photo by R. Freyre.jpg Ruellia chartacea_bract.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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