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Types of crystal in fibre-associated crystalliferous parenchyma. (A) Transverse section of Perianthomega vellozoi crystalliferous parenchyma sheath bearing acicular crystals (arrows). (B) Transverse section of Mansoa standley: crystalliferous parenchyma sheath bearing prismatic crystals (arrows). (C) Ancestral character state reconstruction of type of crystals in fibre-associated crystalliferous parenchyma. Scale bar = 50 µm.
