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  • Hellebore (Helleborus atrorubens): fruiting stem with roots and separate flowering stem. Coloured etching after J. Schütz, c.1802.
  • Human brain cancer stem cells, SEM
  • Human brain cancer stem cells, SEM
  • Human brain cancer stem cells, SEM
  • Human brain cancer stem cells, SEM
  • Rat neural stem cells in culture
  • Mouse neural stem cells in culture
  • Neurons derived from neural stem cells
  • Neurons derived from neural stem cells
  • Neurons derived from neural stem cells
  • Stinging nettle (Urtica dioica) stem, SEM
  • Shigella flexneri invading embryonic stem cell
  • Daffodil (Narcissus species): flowering stem. Watercolour.
  • A creeping leafy plant stem. Watercolour.
  • Mallow (Malva species): flowering stem. Watercolour.
  • Mugwort (Artemisia vulgaris): flowering stem. Watercolour.
  • An unidentified fruiting plant stem. Watercolour.
  • Groundsel (Senecio vulgaris): flowering stem. Watercolour.
  • Jasmine (Jasminum species): flowering stem. Watercolour.
  • Butterbur (Petasites japonicus): flowering stem. Watercolour.
  • A Justicia plant: flowering stem. Watercolour.
  • Valerian (Valeriana dioscoriodes Sibth.): flowering stem with separate rooting stem and floral sections. Coloured etching by M. Bouchard, 1774.
  • Valerian (Valeriana officinalis L.): flowering stem with separate rooting stem and floral sections. Coloured etching by M. Bouchard, 1774.
  • Human neural stem cells stained for Sox2 (green) and vimentin (red). Both are markers of neural stem cells.
  • A plant (Verbena americana): flowering stem with separate lower stem and floral segments. Coloured etching by M. Bouchard, 1775.
  • A leafy plant stem with stolons. Watercolour.
  • Rose stem with autumn leaves. Watercolour drawing.
  • Dog rose (Rosa canina): flowering stem. Wat
  • CT scan; brain cancer (glioma), brain stem
  • CT scan; brain cancer (glioma), brain stem