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Ruellia blechum.jpg Ruellia longepetiolata_weed in horticulture.jpg Ruellia elegans_enantiostyly.jpg Ruellieae pollen_Daniel1998.jpg Ruellia macrophylla var. lutea.jpg Ruellia speciosa x R. conzattii_artificial hybrid.jpg Ruellia neesiana.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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