Ruellia norvegigratiosa_leaf gland.jpg Ruellia tubiflora.jpg Ruellia laslobasensis.jpg Ruellia oaxacana.jpg Ruellia strepens_non-resupinate flowers2.jpg Ruellia longipedunculata.jpg Ruttya fruticosa.jpeg.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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