Calcium oxalate crystals (druse) in garden rhubarb (Rheum rhabarbarum), light micrograph. Druse crystals are a common occurrence in many plants and are usually granular or star-like in shape. The crystals are a defence against herbivores. Magnification: x372 when printed at 10 centimetres wide.

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Size: 7310px × 4323px
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Photo credit: © MAREK MIS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, anatomical, anatomy, biological, biology, botanical, botany, calcium, cross-section, crystal, defence, defense, druse, flora, garden, herbivores, interior, internal, layer, light, lm, micrograph, microscope, microscopy, nature, oxalate, plant, polarised, polarized, rhubarb, section, stalk, structure, tissue, transverse