Pseuderanthemum sp._Oaxaca.jpg Ruellia humboldtiana_fruit.jpg Ruellia elegans_Anthocyanidin Synthase Chromatogram copy.jpg Ruellia insignis.jpg Ruellia geminiflora.jpg sister species Ruellia saccata and R. brevifolia.jpg Sanchezia cf. speciosa.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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