Anoura caudata_nectar bat with pollen on head.jpg Sanchezia parvibracteata2.jpg Ruellia terminale_cleistogamous flowers.jpg Tetramerium sp.jpg Ruellia tubiflora.jpg Ruellia strepens_non-resupinate flowers2.jpg Ruellia ochroleuca.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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