Ruellia tubiflora_nectar guide.jpg Ruellia malaca_nectary.jpg Ruellia stemonacanthoides.jpg Ruellia ochroleuca_trigonid bee.jpg DNA alignment_Acanthaceae trnG-trnR copy.jpg Dyschoriste hirsutissima.jpg Ruellia tuberosa.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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