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Ruellia macrophylla var. lutea.jpg Asystasia_gangetica_in_Hyderabad_W_IMG_4769.jpg Justicia sp2.jpg Ruellia hygrophila.jpg Tetramerium sp.jpg Ruellia strepens_resupinate flowers.jpg Ruellia elegans_enantiostyly.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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