Ruellia ruiziana_photo be A. Schmidt-Lebuhn.jpg Anoura caudata_nectivorous bat.jpg Ruellia norvegigratiosa_leaf gland.jpg Ruellia geminiflora_color polymorphism.jpg Ruellia elegans x R. matudae_artificial hybrids.jpg.jpg Ruellieae pollen_Daniel1998.jpg Anisacanthus.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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