54.3 MB (2.1 MB compressed)
4873 x 3898 pixels
41.1 x 33.0 cm ⏐ 16.2 x 13.0 in (300dpi)
DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
St. John's wort flower bud. Light micrograph of a section through a St. John's wort (Hypericum perforatum) flower bud. From outer to centre: five sepals (green); five petals (green); numerous anthers, each with four pollen sacs full of pollen (red); pistil and style (green). Magnification: x3, when printed 10 centimetres wide.
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