Sanchezia sp._albino morph.jpg Ruellia bourgaei_food for herbivores2.jpg Ruellia ochroleuca_trigonid bee.jpg Ruellia galeottii.jpg Ruellia tuberosa.jpg Ruellia malacosperma.jpg Ruellia norvegigratiosa_leaf cystoliths.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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