55.3 MB (6.1 MB compressed)
4395 x 4394 pixels
37.3 x 37.1 cm ⏐ 14.7 x 14.6 in (300dpi)
DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Mexican marigold flower bud. Light micrograph of a section through a Mexican marigold (Tagetes erecta) flower bud. A ring of bracts encloses the flower head in bud. This slice of flowers (florets) is shown at many levels. Level one shows one petal (purple-red) wrapped around the pistil/stigmas (left). Level two is the corolla - a ring (blue) with eight veins wrapped around the style (purple, centre right). Level three is the ovary wall - a ring (blue and purple) wrapped around the ovule (purple-red, right). Magnification: x4, when printed 10 centimetres wide.
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